Argricultural chemical composition

Abstract: An agricultural chemical composition comprising an agricultural chemical and an effective amount for enhancing the effectiveness of the agricultural chemical of an enhancer compound selected from the group consisting of ammonium compounds represented by the following general formulae (I) to (III): wherein A,B,C,D R¹,R⁴,R⁷,R⁸,R⁹,n,Y,Z and X have the meanings given in the description.

Description: Background of the Invention Field of the Invention The present invention relates to a method for enhancing the effectiveness of an agricultural chemical, a novel agricultural chemical composition containing a specific enhancer and a use of an enhancer for the preparation of the agricultural chemical composition. Description of the Related Art Agricultural chemicals including fungicides (or bactericides), insecticides, herbicides, acaricides (or miticides) and plant growth regulators have been used in the forms of, for example, emulsions, wettable powders, granules, powders and flowables. In the properties of these agricultural chemical preparations, various attempts have been made to achieve the maximum effectiveness of the agricultural chemicals. However, it has been difficult to enhance the effectiveness of agricultural chemicals through adjustments in formulations. It is further difficult to develop novel agricultural chemicals. Therefore, further enhancement of existing agricultural chemicals would highly contribute to the industry. As substances capable of enhancing agricultural chemicals, surfactants comprising various nitrogen-containing compounds such as quaternary ammonium salts, betaines and amine oxides have been known (see European Patent Publication-A No. 274369, published on July 13, 1988). It is known that quaternized or further polyoxyethylenated long-chain amines, among the above-mentioned compounds, are effective for this purpose. These compounds capable of enhancing agricultural chemicals each contains a halogen ion as a counter ion. Namely, these compounds are halide compounds. However, these compounds are irritative. EP 509 346 A discloses a biocide composition comprising (A) 1 to 50 % by weight of a biocide, and (B) 0.005 to 60 % by weight of a biocide activator being a specific quaternary ammonium compound. JP-A-60 289 06 discloses agricultural fungicides containing a fungicidal guanidine compound and a cationic surfactant, said cationic surfactant being selected from specific quaternary ammonium compounds. Disclosure of the Invention Summary of the Invention From the viewpoint that agricultural chemicals can be enhanced by the combined use of agricultural chemicals with quaternary ammonium salt compounds, the present inventors have conducted extensive studies. As a result, they have found that specific compounds, among quaternary ammonium salt compounds, are particularly effective in enhancing the effectiveness of various agricultural chemicals, thus completing the present invention. Thus, the present invention provides an agricultural chemical composition comprising an agricultural chemical and an effective amount for enhancing the effectiveness of the agricultural chemical of an enhancer compound selected from the group consisting of compounds represented by the following general formulae (I) to (III): wherein A represents a hydrogen atom, -CH 2 CH 2 CN, -CH 2 CH 2 COOH, (wherein n is 2 to 9, p is 0 to 30, R or each of the plural R's is a hydrogen atom or a methyl group and R 2 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -C m H 2m NH-COR 2 (wherein m is 2 to 9 and R 2 is as described above) or (wherein r is 2 to 6 and m, p, R and R 2 are described above); B, C and D are either the same or different from one another and each represents a hydrogen atom, a methyl group, an ethyl group, -(C i H 2i 0) j -COR 3 (wherein i is 2 to 6, j is 1 to 10 and R 3 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -CH 2 COO ⊖ , -CH 2 COOH, -(C i H 2i 0) j -H (wherein i and j are as described above), -CH 2 CH(OH)CH 2 SO 3 ⊖ or with the proviso that only one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ or B, C and D are other than -CH 2 COO ⊖ and -CH 2 CH(OH)CH 2 SO 3 ⊖ ; R 1 represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ represents a counter ion; with the proviso that when one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ , X ⊖ should be deleted from the formula (I), wherein Y and Z are either the same or different from each other and each represents an alkyl or alkenyl group having 6 to 30 carbon atoms, (wherein p is 0 to 30, R 5 or each of the plural R 5 's is a hydrogen atom or a methyl group and R 6 is an alkyl or alkenyl group having 5 to 29 carbon atoms), -C 3 H 6 NHCOR 6 (wherein R 6 is as described above), -C 3 H 6 OR 6 (wherein R 6 is as described above), -CH 2 CH(OH)CH 2 OR 6 (wherein R 6 is as described above) or (wherein m is 2 to 9, n is 2 to 9 and p, R 5 and R 6 are described above), with the proviso that Y and Z do not simultaneously represent alkyl and/or alkenyl groups having 6 to 30 carbon atoms; R 4 represents an alkyl group having 1 to 4 carbon atoms or (wherein q is 1 to 30 and R 5 is as described above); and X ⊖ represents a counter ion, and wherein R 7 and R 8 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or (wherein q is 1 to 30 and R 10 or each of the plural R 10 's is a hydrogen atom or a methyl group); R 9 represents an alkyl group having 6 to 36 carbon atoms, (wherein n is 2 to 9, p is 0 to 30, R 11 is an alkyl group having 5 to 35 carbon atoms and R 10 is as described above), -C m H 2m NH-COR 11 (wherein m is 2 to 9 and R 11 is as described above) or (wherein r is 2 to 6 and m, p, R 10 and R 11 are described above); W represents (wherein p, R 10 and R 11 are as described above), -NH-COR 11 (wherein R 11 is as described above) or (wherein p, r, R 10 and R 11 are as described above); n is 2 to 9; and X ⊖ is a counter ion. Examples of the counter ion include a halogen ion such as Cl - , Br - or I - , an alkylsulfate anion (RSO 4 - ), an alkylbenzenesulfonic acid anion (R-benzene-SO 3 - ), an alkylnaphthalenesulfonic acid anion (R-naphthalene-SO 3 - ), a fatty acid anion (RCOO - ), an alkylphosphate anion (ROPO 3 H - ], an anionic oligomer and an anionic polymer. As described above, a counter ion against N ⊕ is X ⊖ , or -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ as the substituent B, C or D in the general formula (I). Preferable examples of the compounds represented by the above general formula (I) include those represented by the following general formula (Ia): wherein A represents H, -CH 2 CH 2 -CN, -CH 2 CH 2 COOH, B, C and D are either the same or different from one another and each represents H, -CH 3 , -CH 2 CH 3 , -CH 2 COO ⊖ , -CH 2 COOH, - (C p H 2p O) q -H (p = 2∼6, q = 1∼10), R 1 to R 5 are either the same or different from one another and each represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ is a counter ion. Preferable examples of the compounds represented by the above general formula (II) include those represented by the following general formula (IIa): wherein Y and Z are either the same or different from each other and each represents an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, -C 2 H 4 OCOR, -C 3 H 6 NHCOR, -C 3 H 6 OR or -CH 2 CH(OH)CH 2 OR (provided that Y and Z do not simultaneously represent alkyl or alkenyl groups having 6 to 30 carbon atoms); R represents an alkyl group having 5 to 29 carbon atoms or an alkenyl group having 5 to 29 carbon atoms; R 1 represents an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group having 1 to 4 carbon atoms; and X ⊖ is a counter ion. Preferable examples of the compounds represented by the above general formula (III) include those represented by the following general formula (IIIa): wherein R 1 and R 2 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 1 to 4 carbon atoms; R 3 represents an alkyl group having 6 to 36 carbon atoms, -C m H 2m OCOR 4 or -C m H 2m NHCOR 4 (m = 2 ∼ 9); R 4 represents an alkyl group having 5 to 35 carbon atoms; Y represents -OCOR 5 or -NHCOR 5 ; R 5 represents an alkyl group having 5 to 35 carbon atoms; n is 2 ∼ 9; and X ⊖ is a counter ion. Further, the present invention provides a method for enhancing the effectiveness of an agricultural chemical which comprises applying an enhancer compound selected from the group consisting of compounds represented by the above general formulae (I) to (III) with an agricultural chemical to a locus which would benefit from such treatment. In this method, the enhancer and the agricultural chemical are generally diluted with water or a liquid carrier. Examples of the locus or the area to be treated include farm, plantaion, fruit garden, orchard, flower garden, lawn, wood and forest. Examples of the locus include, further, plants, crops such as cereals, vegetables and fruits, trees, fruit trees, grasses, weeds, seeds, fungi, bacteria, insects, acarids and mites. Furthermore, the present invention provides a use of a compound selected from the group consisting of compounds represented by the above general formulae (I) to (III) for the preparation of an agricultural chemical composition, an enhancer (or an adjuvant) for agricultural chemicals comprising a compound selected from the group consisting of compounds represented by the above general formulae (I) to (III); and a use of the enhancer for enhancing the efficacy of an agricultural chemical. In addition, the present invention provides an agricultural chemical kit which comprises a container containing the enhancer described above and a container containing an agricultural chemical composition; another agricultural chemical kit which comprises a container containing the enhancer described above and a surfactant other than the compounds represented by the above formulae (I) to (III) and a container containing an agricultural chemical composition; and another agricultural chemical kit which comprises a container containing the enhancer described above, a container containing a surfactant other than the compounds represented by the above formulae (I) to (III) and a container containing an agricultural chemical composition. In this specification, the term "agricultural chemical" means one which is employed as an active or principle ingredient in common agricultural chemical compositions or preparations, and examples thereof include a fungicide (or a bactericide), an insecticide, an acaricide (or a miticide), a herbicide, a plant growth regulator and the like. Further the scope and the applicability of the present invention will become apparent from the detailed description given hereinafter. Detailed Description of the Invention In the present invention, compounds represented by the above general formulae (I), (II) or (III) are used as enhancers for agricultural chemicals. Among the compounds represented by the above general formula (I), those wherein A represents -C n H 2n O-COR 2 or -C m H 2m NH-COR 2 (wherein R 2 is an alkyl or alkenyl group having 10 to 30 carbon atoms) and B, C and D are each a hydrogen atom or a methyl group may be cited as particularly suitable. The compound of the general formula (I) used according to the present invention can be obtained by, for example, reacting an N,N-dialkylaminoalkylamine with a nitrile compound, hydrogenating the obtained product to give a triamine, reacting the triamine thus obtained with a fatty acid to thereby give a diamide amine and then quaternizing this diamide amine with, for example, an alkyl chloride. Needless to say, the method for the preparation of the compound of the general formula (I) according to the present invention is not restricted thereto. Among the compounds represented by the general formula (II), those wherein R 4 is an alkyl group having 1 to 4 carbon atoms, and either Y or Z is a group having an ester bond or an amido group and another is an alkyl group may be cited as particularly suitable. The compound of the general formula (II) used according to the present invention can be obtained by, for example, reacting the corresponding secondary amine with an epoxy compound or a halo alcohol to thereby give an amino alcohol and esterifying this amino alcohol with a fatty acid or a fatty acid ester to thereby give the ester amine of the present invention. Alternatively, the amide amine of the present invention can be obtained by allowing the corresponding secondary amine and acrylonitrile to undergo an addition reaction and hydrogenating, followed by the amidation of the amine thus obtained with a fatty acid or a fatty acid ester. Needless to say, the method for the preparation of the compound of the general formula (II) used according to the present invention is not restricted thereto. Among the compounds represented by the general formula (III), the compound represented by the following formula is particularly preferable: The compound of the general formula (III) used according to the present invention is prepared by, for example, cyanoethylating an N-(lower alkyl)alkanolamine, hydrogenating the reaction product, condensing the corresponding tertiary amine thus obtained with a fatty acid and quaternizing it in a conventional manner. Alternatively, the compound of the general formula (III) can be prepared by condensing N,N-dimethylpropanediamine with a fatty acid and then quaternizing it with an alkyl halide. Needless to say, the method for the preparation of the compound of the general formula (III) according to the present invention is not restricted thereto. When used together with an agricultural chemical, the enhancer for agricultural chemicals used according to the present invention, i.e., the compound represented by the above general formulae (I), (II) or (III), can enhance the effectiveness of the agricultural chemical twice or thrice without causing any chemical injury. Namely, the enhancer for agricultural chemicals of the present invention can be safely applied to various crops without causing any chemical injury. It has not necessarily been clarified why the enhancer for agricultural chemicals comprising the compound of the general formula (I), (II) or (III) used according to the present invention exerts a remarkable enhancement effect regardless of the type of the structure of the agricultural chemical. One of the reasons therefor seemingly resides in that the enhancer of the present invention exerts a very strong solubilizing power on an agricultural chemical and, therefore, promotes the penetration of the agricultural chemical into the surfaces of plants, insects, fungi or bacteria. The combined use of at least one compound selected from the group consisting of the compounds represented by the general formulae (I) to (III) used according to the present invention with surfactant(s) other than these compounds makes it possible to reduce the dose of the compound(s) represented by the general formulae (l) to (III) while maintaining their enhancement effect on agricultural chemicals. As surfactants other than the compounds represented by the general formulae (I) to (III), nonionic surfactants, anionic surfactants, cationic surfactants, ampholytic surfactants and mixtures of two or more surfactants described above are useful. Examples of the nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene alkylaryl ether/formaldehyde condensates, polyoxyalkylene aryl ethers, polyoxyalkylene alkyl esters, polyoxyalkylene alkylsorbitol esters, polyoxyalkylene sorbitan esters, polyoxyalkylene alkylglycerol esters, polyoxyalkylene block copolymers, polyoxyalkylene block copolymer/alkylglycerol esters, polyoxyalkylene alkylsulfonamides, polyoxyalkylene rosin esters, polyoxypropylene block copolymers, polyoxyethylene oleyl ether, polyoxyalkylene alkylphenols and mixtures comprising two or more of these surfactants. Examples of the cationic surfactants include alkylamine/ethylene oxide adducts and alkylamine/propylene oxide adducts such as tallow amine/ethylene oxide adduct, oleylamine/ethylene oxide adduct, soy amine/ethylene oxide adduct, coco amine/ethylene oxide adduct, synthetic alkylamine/ethylene oxide adducts, octylamine/ethylene oxide adduct and mixtures thereof. Among anionic surfactants, typical ones are available in the form of an aqueous solution or a solid. Examples thereof include sodium mono- and dialkylnaphthalenesulfonates, sodium α-olefinsulfonate, sodium alkanesulfonates, alkyl-sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkyl aryl ether sulfates, polyoxyalkylene styryl phenyl ether sulfates, mono- and dialkylbenzenesulfates, alkylnaphthalenesulfates, alkylnaphthalenesulfonate/formaldehyde condensates, alkyl diphenyl ether sulfonates, olefinic sulfonates, alkylphosphates, polyoxyalkylene alkylphosphates, polyoxyalkylene phenyl ether phosphates, polyoxyalkyl phenol phosphates, polycarboxylic acid salts, fatty acid salts, stearic acid and its salts, oleic acid and its salts, N-methyl fatty acid taurides and mixtures comprising two or more of these surfactants (including sodium, potassium, ammonium and amine salts). Examples of suitable ampholytic surfactants include lauryldimethylamine oxide, Armox C/12, amine oxides, Monaterics, Miranols, betaine, Lonzaines, other amine oxides and mixtures thereof. Among these surfactants, nonionic surfactants are particularly preferable. Still preferable surfactants include those of the ester type, such as polyoxyalkylene sorbitan esters and polyoxyalkylene alkyl glycerol esters, polyoxyalkylene alkyl ethers and polyoxyalkylene alkylnonyl phenols. In an enhancer (or an enhancer composition) for agricultural chemicals comprising the compound(s) represented by the general formulae (I) to (III) and surfactant(s) other than said compounds, the weight ratio of the content of the compound(s) of the general formulae (I) to (III) to the content of the surfactant(s), i.e., [the (total) content of the compound(s) of the general formulae (I) to (III)/the (total) content of the surfactant(s) other than said compounds], preferably ranges from 1/10 to 50/1, still preferably from 1/1 to 10/1. The agricultural chemical composition of the present invention comprises the above-mentioned enhancer and an agricultural chemical. In the agricultural chemical composition comprising the enhancer and an agricultural chemical according to the present invention, it is necessary to use the compound(s) represented by the general formulae (I) to (III), i.e., the enhancer, in an amount wherein the ratio of the (total) content of the compound(s) of the general formulae (I) to (III)/the (total) content of the agricultural chemical(s) is from 0.05 to 50, preferably from 0.05 to 20 and still preferably from 0.1 to 10. When this ratio is below 0.05, any desired effect of enhancing the effectiveness of the agricultural chemical(s) can be fully achieved. When this ratio exceeds 50, on the other hand, the enhancing effect is no longer improved. Next, examples of the agricultural chemicals to be used in the agricultural chemical composition of the present invention will be cited, though the present invention is not restricted thereto. In the case of fungicides (or bactericides), included are Dithane or Dipher [zinc ethylenebis(dithiocarbamate)], Maneb or Maneb-dithane [manganese ethylenebis(dithiocarbamate)], Thiram or Thiram 80 [bis(dimethylthiocarbamoyl) disulfide], Mancozeb [complex of zinc and manganese ethylenebis(dithiocarbamate)], Bis-Dithane [dizinc bis(dimethyldithiocarbamate) ethylenebis(dithiocarbamate)], Propineb or Antracol [polymeric zinc propylenebis(dithiocarbamate)], benzimidazole fungiicides such as Benomyl or Benlate [methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate] and Thiophanate-methyl or Topsin M [1,2-bis(3-methoxycarbonyl-2-thioureido)benzene], Vinclozolin or Ronilan [3-(3,5-dichlorophenyl)-5-methyl-5-vinyl-1,3-oxazolidine-2,4-dione], Iprodione or Rovral [3-(3,5-dichlorophenyl)-N-isopropyl-2,4-dioxoimidazolidine-1-carboxamide], Procymidone or Sumilex [N-(3,5-dichlorophenyl)-1,2-dimethylcyclopropane-1,2-dicarboximide], Triazine [2,4-dichloro-6-(2-chloroanilino)-1,3,5-triazine], Triflumizole or Trifmine [(E)-4-chloro-α,α,α-trifluoro-N-(1-imidazol-1-yl-2-propoxyethylidene)-o-toluidine], Metalaxyl or Ridomil [methyl-N-(2-methoxyacetyl)-N-(2,6-xylyl)-D,L-alaninate], Bitertanol or Baycoral [all-rac-1-(biphenyl-4-yloxy)-3,3-dimethyl-1-(1H-1,2,4-triazol-1-yl)-2-butan-2-ol], Triadimefon or Bayleton [1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)-2-butanone], Isoprothiolane or Fuji-one (diisopropyl 1,3-dithiolan-2-ylidenemalonate), Daconil (tetrachloroisophthalonitrile), Pansoil (5-ethoxy-3-trichloromethyl-1,2,4-thiadiazole), Rabcide (4,5,6,7-tetrachlorophthalide), Kitazin P (O,O-diisopropyl S-benzyl thiophosphate), Hinosan (O-ethyl S,S-diphenyl dithiophosphate), Probenazol or Oryzemate (3-allyloxy-1,2-benzisothiazole 1,1-dioxide) and Captan or Orthocide (N-trichloromethylthiotetrahydrophthalimide). In the case of insecticides, included are pyrethroid insecticides such as Fenvalerate or Vegiphon [α-cyano-3-phenoxybenzyl 2-(4-chlorophenyl)-3-methylbutanoate] and Baythroid [α-cyano-4-fluoro-3-phenoxyphenylmethyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclcopropanecarboxylate], organophosphorus insecticides such as DDVP or Des (dimethyl 2,2-dichlorovinyl phosphate), Sumithion [O,O-dimethyl O-(3-methyl-4-nitrophenyl)thiophosphate], Malathon or Malathion (S-[1,2-bis(ethoxycarbonyl)ethyl]dimethyl phosphorothionate), Dimethoate [dimethyl S-(N-methylcarbamoylmethyl)dithiophosphate], Elsan or Papthion (S-[α-(ethoxycarbonyl)benzyl]dimethyl phosphorothiolthionate) and Baycid [O,O-dimethyl O-(3-methyl-4-methylthiophenyl)thiophosphate], carbamate insecticides such as Bassa (o-sec-butylphenyl methylcarbamate), MTMC or Tsumacide (m-tolyl methylcarbamate), Meobal (3,4-dimethylphenyl N-methylcarbamate) and NAC or Papnac (1-naphthyl N-methylcarbamate), Methomyl or Lannate (S-methyl-N-[(methylcarbamoyl)oxy]thioacetimidate) and Cartap or Padan [1,3-bis(carbamoylthio)-2-(N,N-dimethylamino)propane hydrochloride]. In the case of acaricides (or miticides), included are Sunmite [2-tert-butyl-5-(4-tert-butylbenzylthio)-4-chloropyridazin-3(2H)-one], Acricid (2,4-dinitro-6-sec-butylphenyldimethylacrylate], Chloromite (isopropyl 4,4-dichlorobenzylate), Akar (ethyl 4,4-dichlorobenzilate), Kelthane [1,1-bis-(p-chlorophenyl)-2,2,2-trichloroethanol], Citrazon (ethyl O-benzoyl-3-chloro-2,6-dimethoxybenzohydroximate), Omite [2-(p-tert-butylphenoxy)cyclohexyl 2-propynyl sulfite], Osadan [hexakis(β,β-dimethylphenylethyl)distannoxane], Hexythiazox or Nissorun [trans-5-(4-chlorophenyl)-N-cyclohexyl-4-methyl-2-oxo-thiazolidine-3-carboxamide] and Amitraz or Dani-Cut [3-methyl-1,5-bis(2,4-xylyl)-1,3,5-triazapenta-1,4-diene]. In the case of herbicides, included are acid amide hebicides such as Stam (3',4'-dichloropropionanilide, DCPA) and Dacklone (3-chloro-2-methyl-p-valerotoluidide, CMMP), urea herbicides such as DCMU or Karmex [3-(3,4-dichlorophenyl)-1,1-dimethylurea] and Linuron [3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea), dipyridyl herbicides such as Paraquat (1,1'-dimethyl 4,4'-bipyridinium dichloride) and Diquat (6,7-dihydrodipyrido[1,2-a:2',1'-c]pyrazindiium dibromide), diazine herbicides such as Bromacil (5-bromo-3-sec-butyl-6-methyluracil), S-triazine herbicides such as Simazine [2-chloro-4,6-bis(ethylamino)-1,3,5-triazine] and Simetryne [2,4-bis(ethylamino)-6-methylthio-1,3,5-triazine], nitrile herbicides such as DBN (2,6-dichlorobenzonitrile), dinitroaniline herbicides such as Trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), carbamate herbicides such as Benthiocarb or Saturn [S-(p-chlorobenzyl) N,N-diethylthiolcarbamate] and MCC (methyl 3,4-dichlorocarbanilate), diphenylether herbicides such as NIP (2,4-dichlorophenyl-p-nitrophenylether), phenol herbicides such as PCP (sodium pentachloro-phenoxide), benzoic acid herbicides such as MDBA (dimethylamine-3,6-dichloro-o-anisate), phenoxy herbicides such as sodium 2,4-D (sodium 2,4-dichlorophenoxyacetate) and Mapica ([(4-chloro-o-toluyl)oxy]-aceto-o-chloroanilide), organic phosphorus herbicides such as Glyphosate [N-(phosphonomethyl)glycine] and salts thereof, Bialaphos or Herbiace (sodium salt of L-2-amino-4-[(hydroxy)(methyl)= (phosphinoyl)]butyryl-L-alanyl-L-alanine) and Glufosinate or Basta [ammonium DL-homoalanin-4-yl (methyl)phosphinate], and aliphatic herbicides such as sodium TCA (sodium trichloroacetate). In the case of plant growth regulators, included are MH (maleic hydrazide), Ethrel (2-chloroethylphosphonic acid), UASTA and Bialaphos or Herbiace. The agricultural chemical composition of the present invention may be formulated into any preparation such as emulsions, wettable powders, granules powders or flowables without any limitation. Accordingly, said composition may contain other additives which are selected depending on the formulation, for example, emulsifiers, dispersing agents and carriers. The agricultural chemical composition according to the present invention may further contain a chelating agent, a pH regulator, an inorganic salt or a thickener, if required. Examples of chelating agents include aminopolycarboxylic acid type chelating agents, aromatic or aliphatic carboxylic acid type chelating agents, amino acid type chelating agents, ether polycarboxylic acid type chelating agents, iminodimethylphosphonic acid (IDP), dimethylglyoxime (DG) and alkyldiphosphonic acids (ADPA). These chelating agents are as such or in the form of salts (sodium, potassium or ammonium salt) thereof. Examples of the aminopolycarboxylic acid type chelating agents include a) compounds represented by the chemical formula of RNX 2 , b) compounds represented by the chemical formula of NX 3 , c) compounds represented by the chemical formula of R-NX-CH 2 CH 2 -NX-R, d) compounds represented by the chemical formula of R-NX-CH 2 CH 2 -NX 2 , e) compounds represented by the chemical formula of X 2 N-R'-NX 2 and f) compounds similar to compounds of e) and containing four or more X's, for example, a compound represented by the formula: In the above formulae, X represents -CH 2 COOH or -CH 2 CH 2 COOH, R represents a group to be contained in these type, known chelating agents such as a hydrogen atom, an alkyl group, a hydroxy group and a hydroxyalkyl group, and R' represents a group to be contained in these type, known chelating agents such as an alkylene group and a cycloalkylene group. Representative examples of the aminopolycarboxylic acid type chelating agents include ethylenediaminetetraacetic acid (EDTA), cyclohexanediaminetetraacetic acid (CDTA), nitrilotriacetic acid (NTA), iminodiacetic acid (IDA), N-(2-hydroxyethyl)iminodiacetic acid (HIMDA), diethylenetriaminepentaacetic acid (DTPA), N-(2-hydroxyethyl)ethylenediaminetriacetic acid (EDTA-OH) and glycoletherdiaminetetraacetic acid (GEDTA), and salts thereof. Examples of the aromatic or aliphatic carboxylic acid type chelating agents to be used in the present invention include citric acid, oxalic acid, glycolic acid, pyruvic acid and anthranilic acid, and salts thereof. Further, examples of the amino acid type chelating agents to be used in the present invention include glycine, serine, alanine, lysine, cystine, cysteine, ethionine, tyrosine and methionine, and salts and derivatives thereof. Furthermore, examples of the ether polycarboxylic acid type chelating agents include compounds represented by the following formula, compounds similar to the compounds represented by the following formula and salts (e.g., sodium salt) thereof: wherein Y represents a hydrogen atom, -CH 2 COOH or -COOH, and Z represents a hydrogen atom, -CH 2 COOH or Examples of the pH regulators to be used in the present invention include citric acid, phosphoric acid (e.g., pyrophosphoric acid) and gluconic acid, and salts thereof. Examples of the inorganic acid salts to be used in the present invention include inorganic mineral salts such as inorganic salts of clay, talc, bentonite, zeolite, calcium carbonate, diatomaceous earth and white carbon, and inorganic ammonium salts such as ammonium sulfate, ammonium nitrate, ammonium phosphate, ammonium thiocyanate, ammonium chloride and ammonium sulfamate. In addition, examples of thickeners to be used in the present invention include natural, semisynthetic and synthetic, water-soluble thickeners. As natural mucilaginous matters, xanthane gum and zanflow, which are derived from microorganism, and pectine, gum arabic and guar gam, which are derived from plant, are cited. As semisynthetic mucilaginous matters, methylated, carboxyalkylated and hydroxyalkylated products of cellulose such as methylcellulose, carboxymethylcellulose and hydroxymethylcellulose, methylated, carboxyalkylated and hydroxyalkylated products of starch derivatives, and sorbitol are cited. Furthermore, polyacrylates, polymaleates, polyvinylpyrrolidone and pentaerythritol/ethyleneoxide adducts are cited as synthetic mucilaginous matters. The agricultural chemical composition of the present invention may further contain one or more ingredients such as plant growth regulators other than those cited above, fertilizers and preservatives. The agricultural chemical composition of the present invention is used in order to control fungi (or bacteria), insects, acarids (or mites) and herbs or to regulate the growth of plants. The agricultural chemical kit according to the present invention comprises a container containing the enhancer according to the present invention and another container containing an agricultural chemical composition. In this case, the enhancer may comprise at least one compound represented by the above general formulae (I) to (III), or a mixture of at least one compound represented by the above general formulae (I) to (III) and at least one surfactant other than the compounds represented by the above general formulae (I) to (III). Alternatively, another agricultural chemical kit according to the present invention comprises a container containing at least one compound represented by the above general formulae (I) to (III), a container containing at least one surfactant other than the compounds represented by the above general formulae (I) to (III) and a container containing an agricultural chemical composition. The "agricultural chemical composition" which is a constituent of the kit is a composition which comprises an agricultural chemical(s), is free from the compounds represented by the above general formulae (I) to (III) and is in the form of, for example, an emulsion or a wettable powder. In the agricultural chemical kit according to the present invention, a composition comprising an agricultural chemical is separated from the compounds represented by the above general formulae (I) to (III). Namely, the kit differs from an agricultural chemical composition comprising the enhancer for agricultural chemicals and an agricultural chemical(s) in admixture. Each of contents in these containers is not restricted in their form but appropriately prepared depending on the use and purpose. The material of the container is not restricted so long as it is not react with or affect the content. Examples of the material include plastics, glass, foil, etc. The enhancer used according to the present invention is applied with an agricultural chemical to a locus which would benefit from such treatment, i.e., the application of the enhancer and the agricultural chemical. In general, the enhancer and the agricultural chemical are used with water or a liquid carrier. As means for applying the enhancer for agricultural chemicals according to the present invention, (1) one wherein an agricultural chemical composition of the present invention containing the enhancer and having a preparation form is used (if necessary, the agricultural chemical composition is diluted with, for example, tap water), (2) another one wherein an enhancer is added to an agricultural chemical composition, which has been diluted with water, and (3) another one wherein an enhancer is diluted with water and then an agricultural chemical composition is diluted with the resultant diluted enhancer solution, are useful. The desired enhancement effect can be achieved by either means. The agricultural chemical composition of the present invention includes one containing the agricultural chemical in high concentration and the enhancer in high concentration, and another one containing the agricultural chemical in an appropriate concentration for application and the enhancer in an appropriate concentration for application. When the former is used, the agricultural chemical composition is diluted with water, etc., for example, just before applying. On the other hand, the agricultural chemical compositions used in the above cases (2) and (3) include those containing the agricultural chemical in high concentration and being free from the enhancer of the present invention. The contents of the agricultural chemical and the enhancer in their diluted solution are not limited. The content of the agricultural chemical in its diluted solution depends on, for example, the kind of the agricultural chemical and its use. While the content of the enhancer in its diluted solution depends on, for example, the kind of the agricultural chemical to be mixed. The diluted liquid comprising an appropriate amount of an agricultural chemical and an appropriate amount of an enhancer of the present invention is applied to, for example, plants, crops, vegetables, fruits, trees, fruit trees, grasses, weeds or seeds, and, at the same time, to fungi, bacteria, insects, acarids or mites. In other words, the diluted liquid is applied to a farm, a plantaion, a fruit garden, an orchard, a flower garden, a lawn, a wood and a forest. Examples The present invention will now be described in more detail with reference to the following Examples which should not be considered to limit the scope of the present invention. Production Example 1 (a) A four-neck flask provided with a stirrer, a thermometer and a dropping funnel was charged with 204 g of N,N-dimethylaminopropylamine and 106 g of acrylonitrile was added dropwise therein over 1 hour while maintaining the liquid temperature at 60°C. After the completion of the addition, the mixture was aged, i.e., maintained, at the same temperature for 5 hours. After the completion of the aging, the reaction mixture was transferred into an autoclave equipped with a stirrer, a thermometer and a pressure gauge. Next, 30 g of Raney nickel was added thereto and hydrogenation was effected over 6 hours while maintaining the hydrogen pressure at 20 kg/cm 2. G. After the completion of the reaction, the Raney nickel was filtered off and the reaction mixture was distilled to thereby give 180 g of a triamine. The boiling point of this product was 86°C/0.2 mmHg. (b) A four-neck flask provided with a stirrer, a thermometer and a dropping funnel was charged with 78 g of the triamine obtained above and 285 g of octadecanoic acid and heated to 150°C. Then amidation was effected at the same temperature for 12 hours while distilling off the water thus formed to thereby give 350 g of the target diamide amine. Based on the NMR and IR spectra, it was confirmed that this diamide amine had the following structure: (c) Subsequently, the diamide amine obtained above was quaternized with methyl chloride in a conventional manner and thus the following compound (hereinafter referred to as "enhancer 1") was obtained. Example 1 The enhancer 1 obtained in the above Production Example 1 was dissolved in deionised water so as to give a 0.2% by weight solution. By using this 0.2% by weight solution, commercially available herbicides, i.e., a Roundup® liquid formulation (content of the active ingredient, i.e., isopropylamine salt of Glyphosate: 41% by weight), a Karmex® wettable powder (content of the active ingredient. i.e., DCMU: 78.5% by weight) and a Herbiace® water-soluble powder (content of the active ingredient, i.e., Bialaphos: 20% by weight) were each diluted 300-fold. Thus, three agricultural chemical compositions of the present invention which contain the same enhancer were obtained. Rich soil obtained from a paddy field, gravels and a culture soil available on the market were mixed one another at the weight ratio of 7:2:1. Pots having an inside diameter of 12 cm were filled with the soil thus obtained. In order to conduct a glasshouse-test, the seeds of crabgrass were sowed in the pots and germinated. The pots wherein the growth of the crabglass was abnormal were abandoned to reduce the irregularity among pots. The pots wherein crabgrasses had been grown at a hight of about 18 cm were used in the test. Spray gun (mf. by Iwata Tosoki Kogyo K.K., type RG) was used for the application of the agricultural chemical compositions to the crabgrasses. The crabgrasses in the pots were uniformly sprayed with each of the agricultural chemical compositions at a ratio corresponding to 10 l/a (liter per are) to evaluate the herbicidal efficacy. On the tenth day after the application, the above-ground part of the fresh plant was weighed and the result was expressed in a herbicidal percentage on the basis of the fresh weight of the above-ground part in the untreated lot (see the following formula). Herbicidal ratio = (above-ground fresh weight of control lot)-(above-ground fresh weight of test lot) (above-ground fresh weight of control lot) × 100 (%) The above procedure was repeated except that the enhancer 1 was replaced by the following enhancers 2 to 24 to thereby give agricultural chemical compositions and the herbicidal efficacy of each composition was evaluated. Further, each agricultural chemical was used alone without adding any enhancer and the herbicidal efficacy was evaluated in the same manner. Namely, 3 agricultural chemical compositions which were prepared by diluting one of the above-described commercially available herbicides 300-fold with deionized water were also evaluated. Table 1 summarizes the results. Enhancer 2; enhancer 1/Emulgen® 909 [POE(9) nonyl phenol ether] = 80/20. Enhancer 3; enhancer 1/Emulgen® 103 [POE(3) C 12 H 25 OH] = 80/20. Enhancer 4; enhancer 1/Emanon® 4110 [POE(10) C 17 H 35 COOH] = 80/20. Enhancer 5; enhancer 1/Rheodol® TWL-120 [POE(20) C 11 H 23 COO sorbitan ester] = 80/20. Enhancer 6; a compound represented by the following formula was used: Enhancer 7; enhancer 6/Emulgen® 703 [a mixture of POE(3) C 12 H 25 OH and POE(3) C 13 H 27 OH] = 75/25. Enhancer 8; enhancer 6/Emanon® 1112 [POE(12) C 11 H 23 COOH] = 75/25. Enhancer 9; enhancer 6/Rheodol® TWL-120 [POE(20) C 17 H 33 COO sorbitan ester] = 75/25. Enhancer 10; didecyldimethylammonium chloride. Enhancer 11; monolauryltrimethylammonium chloride. Enhancer 12; dilauryldihydroxyethylammonium chloride. Enhancer 13; trimethylcocoammonium chloride. Enhancer 14; a compound represented by the following formula was used: Enhancer 15; enhancer 14/Emulgen® 909 = 80/20. Enhancer 16; enhancer 14/Emulgen® 103 = 80/20. Enhancer 17; enhancer 14/Emanon® 4110 = 80/20. Enhancer 18; enhancer 14/Rheodol® TWO-120 = 80/20. Enhancer 19; a compound represented by the following formula was used: Enhancer 20; enhancer 19/Emulgen® 703 = 75/25. Enhancer 21; enhancer 19/Emanon® 1112 = 75/25. Enhancer 22; enhancer 19/Rheodol® TWO-120 = 75/25. Enhancer 23; a compound represented by the following formula was used: Enhancer 24; enhancer 23/Rheodol® TWO-120 = 80/20. The express on "POE" as used herein is an abbreviation of "polyoxyethylene" and each value given in the parentheses is an average addition mole number of oxyethylene. In the above-described enhancers, the composition ratio is by weight. No. of enhancer Herbicidal ratio (%) Karmex® wettable powder Herbiace® water-soluble powder Roundup® liquid formulation Invention product 1 98.5 98.3 99.4 2 99.3 98.3 99.5 3 98.0 97.9 98.1 4 97.8 98.9 99.2 5 97.8 99.1 98.2 6 98.6 98.8 98.8 7 99.4 99.4 99.0 8 99.0 99.3 99.2 9 98.9 98.2 99.3 Comparative product 10 63.5 70.0 73.5 11 44.5 72.2 76.1 12 60.3 70.1 71.1 13 50.3 65.8 75.3 Invention product 14 98.5 98.7 98.7 15 98.5 99.3 98.7 16 98.5 99.0 99.3 17 96.7 99.2 99.4 18 98.5 98.3 98.3 19 98.2 98.3 98.5 20 99.5 98.5 99.3 21 99.3 98.7 98.3 22 99.2 99.0 98.3 23 98.3 99.0 98.1 24 97.8 97.2 98.3 none 18.4 67.5 68.5 Example 2 Female imagines of Tetranychus kanzawai Kishida were planted onto kidney bean leaf disks at a ratio of 30 imagines/lot in triplicate runs and incubated at 25°C for 24 hours. Next, the whole leaf disk was dipped in a test solution for 5 seconds and then taken out of the test solution. After being left to stand at 25°C for 48 hours, the leaf disk was observed and the acaricidal ratio was determined on the basis of the result in the untreated lot (see the following formula). Miticidal ratio = (the number of living acarids of control lot)-(the number of living acarids of test lot) (the number of living acarids of control lot) × 100 (%) As an acaricide, a Nissorun V® emulsion [content of the active ingredient as an agricultural chemical: 55% by weight (50% by weight of hexythiazox + 5% by weight of DDVP)] and an Osadan® wettable powder-25 (content of the active ingredient, i.e., fenbutatin oxide: 25% by weight) were each diluted 2,000-fold and used. The same enhancers for agricultural chemicals as those employed in Example 1 were used. Each agricultural chemical composition was prepared in such a manner as to adjust the concentration of the enhancer for agricultural chemicals in the diluted solution to 0.1% by weight. Further, the same procedure was repeated without using any enhancer for agricultural chemicals. Namely, two agricultural chemical compositions which were prepared by diluting one of the above-described commercially available acaricides 2000-fold with deionized water were also evaluated. Table 2 shows the results. No. of enhancer Acaricidal ratio (%) Nissorun V® emulsion Osadan® wettable powder Invention product 1 98.8 98.8 2 97.8 97.8 3 97.8 100 4 97.8 98.8 5 98.8 100 6 100 98.8 7 98.8 97.8 8 100 100 9 100 99.2 Comparative product 10 50.0 52.2 11 50.0 46.5 12 48.9 52.2 13 50.0 74.4 Invention product 14 97.8 97.8 15 97.8 98.8 16 100 100 17 98.8 99.2 18 92.2 100 19 100 100 20 100 99.2 21 100 100 22 92.2 100 23 98.9 95.6 24 96.7 97.8 none 44.4 38.9 Example 3 Rice insect larvae at the third instar were incubated and used in an efficacy test on insecticides in triplicate runs by the dipping method (each lot having 10 larvae). The insecticidal ratio was determined in the same manner as the one employed for the determination of the acaricidal ratio. Marketed insecticides, namely, a Sumithion® emulsion (content of the active ingredient, i.e., MEP: 50% by weight) and a Malathion® (or Malathon) emulsion (content of the active ingredient, i.e., Malathion®. 50% by weight) were each diluted 2,000-fold and used. As enhancers for agricultural chemicals, those employed in Example 1 were used in such a manner as to adjust their concentration in the diluted solution to 0.1% by weight. Table 3 shows the results. No. of enhancer Insecticidal ratio (%) Sumithion® emulsion Malathion® emulsion Invention product 1 100 90.0 2 100 93.3 3 93.3 100 4 90.0 96.7 5 90.0 96.7 6 100 100 7 100 96.7 8 100 96.7 9 100 100 Comparative product 10 60.0 50.0 11 50.0 53.3 12 53.3 60.0 13 40.0 43.3 Invention product 14 100 100 15 93.3 96.7 16 93.3 93.3 17 100 100 18 96.7 96.7 19 100 93.3 20 100 100 21 93.3 93.3 22 93.3 100 23 96.7 96.7 24 93.3 100 control lot 40.0 50.0 Examples 1, 2 and 3 show the tests wherein the efficacies of the enhancers for agricultural chemicals according to the present invention were compared with those of common cationic surfactants (comparative products) as enhancers for agricultural chemicals. As Tables 1 to 3 clearly indicate, the enhancers for agricultural chemicals of the present invention exerted remarkable effects and thus were usable on a practical level. In contrast, the comparative products somewhat enhanced the efficacies of the agricultural chemicals but were not effective on a practical level. Accordingly, it is observed that the enhancers for agricultural chemicals of the present invention would specifically enhance the efficacies of agricultural chemicals as compared with common cationic surfactants. Example 4 The same test as the one effected in Example 1 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 1 and 14 listed in Example 1 each in a dose as specified in Table 4. Table 4 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 1 2000 200 1/0.1 82.3 2 2000 1000 1/0.5 97.5 3 2000 2000 1/1.0 99.1 4 2000 10000 1/5 99.2 5 2000 24000 1/12 99.1 6 2000 30000 1/15 99.3 7 2000 60000 1/30 99.1 8 2000 0 56.5 9 0 0 10 Enhancer 14 2000 200 1/0.1 78.5 11 2000 1000 1/0.5 88.5 12 2000 2000 1/1.0 92.6 13 2000 10000 1/5 96.0 14 2000 24000 1/12 99.2 15 2000 30000 1/15 99.1 16 2000 60000 1/30 99.3 17 2000 0 56.5 18 0 0 Example 5 The same test as the one effected in Example 1 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 6 and 19 listed in Example 1 each in a dose as specified in Table 5. Table 5 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 6 2000 200 1/0.1 82.1 2 2000 1000 1/0.5 95.3 3 2000 2000 1/1.0 98.7 4 2000 10000 1/5 99.0 5 2000 24000 1/12.0 98.9 6 2000 60000 1/30 99.1 7 2000 80000 1/40 99.1 8 2000 0 56.5 9 0 0 10 Enhancer 19 2000 200 1/0.1 75.4 11 2000 1000 1/0.5 90.5 12 2000 2000 1/1.0 93.5 13 2000 10000 1/5 98.6 14 2000 24000 1/12.0 99.1 15 2000 60000 1/30 99.3 16 2000 80000 1/40 99.1 17 2000 0 56.5 18 0 0 Example 6 The same test as the one effected in Example 1 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 2 and 15 listed in Example 1 each in a dose as specified in Table 6. Table 6 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 2 2000 200 1/0.1 81.8 2 2000 1000 1/0.5 95.4 3 2000 2000 1/1.0 99.1 4 2000 10000 1/5 98.9 5 2000 24000 1/12 99.1 6 2000 30000 1/15 99.2 7 2000 80000 1/40 99.1 8 2000 0 56.5 9 0 0 10 2000 200 1/0.1 85.2 11 Enhancer 15 2000 1000 1/0.5 96.5 12 2000 2000 1/1.0 99.4 13 2000 10000 1/5 99.2 14 2000 24000 1/12 98.7 15 2000 30000 1/15 99.3 16 2000 80000 1/40 99.2 17 2000 0 56.5 18 0 0 Example 7 The same test as the one effected in Example 3 was carried out by using a Sumithion® emulsion as an insecticide and the enhancers 1 and 14 listed in Example 1 each in a dose as specified in Table 7. Table 7 shows the results. Test no. Enhancer Insecticide content (ppm) Enhancer content (ppm) Insecticide/enhancer weight ratio Insecticidal ratio (%) 1 Enhancer 1 250 25 1/0.1 83.3 2 250 125 1/0.5 93.3 3 250 250 1/1.0 100 4 250 500 1/2.0 100 5 250 1000 1/4.0 100 6 250 2500 1/10 100 7 250 5000 1/20 100 8 250 0 46.7 9 0 0 10 Enhancer 14 250 25 1/0.1 83.3 11 250 125 1/0.5 90.0 12 250 250 1/1.0 100 13 250 500 1/2.0 100 14 250 1000 1/4.0 100 15 250 2500 1/10 100 16 250 5000 1/20 100 17 250 0 46.7 18 0 0 Example 8 The same test as the one effected in Example 2 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 5 and 18 listed in Example 1 each in a dose as specified in Table 8. Table 8 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 5 100 10 1/0.1 77.8 2 100 50 1/0.5 91.1 3 100 100 1/1.0 100 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 18 100 10 1/0.1 77.8 11 100 50 1/0.5 91.1 12 100 100 1/1.0 100 13 100 200 1/2.0 100 14 100 1000 1/10 100 15 100 1500 1/15 100 16 100 2000 1/20 100 17 100 0 52.3 18 0 0 2.2 Example 9 The same test as the one effected in Example 2 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 7 and 20 listed in Example 1 each in a dose as specified in Table 9. Table 9 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 7 100 10 1/0.1 72.2 2 100 50 1/0.5 91.1 3 100 100 1/1.0 100 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 20 100 10 1/0.1 77.8 11 100 50 1/0.5 94.4 12 100 200 1/2.0 100 13 100 1000 1/10 100 14 100 0 52.3 15 0 0 2.2 Example 10 The same test as the one effected in Example 1 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 23 and 24 listed in Example 1 each in a dose as specified in Table 10. Table 10 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 23 2000 200 1/0.1 85.6 2 2000 1000 1/0.5 91.2 3 2000 2000 1/1.0 98.5 4 2000 10000 1/5 99.1 5 2000 24000 1/12 98.3 6 2000 30000 1/15 98.4 7 2000 60000 1/30 99.0 8 2000 0 56.5 9 0 0 10 Enhancer 24 2000 200 1/0.1 82.3 11 2000 1000 1/0.5 88.7 12 2000 2000 1/1.0 96.8 13 2000 10000 1/5 97.2 14 2000 24000 1/12 98.3 15 2000 30000 1/15 97.7 16 2000 60000 1/30 98.9 17 2000 0 56.5 18 0 0 Example 11 The same test as the one effected in Example 2 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 23 and 24 listed in Example 1 each in a dose as specified in Table 11. Table 11 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 23 100 10 1/0.1 90.0 2 100 50 1/0.5 92.2 3 100 100 1/1.0 100 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 24 100 10 1/0.1 86.7 11 100 50 1/0.5 92.2 12 100 100 1/1.0 100 13 100 200 1/2.0 100 14 100 1000 1/10 100 15 100 1500 1/15 100 16 100 2000 1/20 100 17 100 0 52.3 18 0 0 2.2 Production Example 2 An autoclave provided with a stirrer, a thermometer, a pressure gauge and a pressure dropping funnel was charged with 250 g of N-methyloctadecylamine and heated to 160°C. Then 45 g of ethylene oxide was occasionally added dropwise thereto under a pressure of 0 to 6 kg/cm 2 G. Three hours were required for completing the addition. Next, the resulting mixture was aged, i.e., maintained, at 160°C for 2 hours and then cooled. The reaction mixture was taken out and distilled to thereby give 250 g of N-(2-hydroxyethyl)-N-methyloctadecylamine. This product had a boiling point of 185 to 190°C/0.2 mmHg. A four-neck flask provided with a stirrer, a thermometer and a dehydrating tube was charged with 200 g of the N-(2-hydroxyethyl)-N-methyloctadecylamine and 174 g of octadecanoic acid. The mixture was heated to 180°C and maintained at this temperature for 12 hours while distilling off the water thus formed. Thus 350 g of N-(2-octadecanoyloxyethyl)-N-methyl-octadecylamine was obtained. Based on the NMR and IR spectra, it was confirmed that this product had the following structure. This compound will be referred to as the enhancer 25 hereinafter. Example 12 The same test as the one effected in Example 1 was carried out, except that the enhancer 25 prepared in Production Example 2 and, the following enhancers 26 to 46 were used to prepare agricultural chemical compositions. Table 12 summarizes the results. Enhancer 26; enhancer 25/Emulgen® 909 [POE(9) nonylphenol ether] = 80/20. Enhancer 27; enhancer 25/Emulgen® 103 [POE(3) C 12 H 25 -OH] = 80/20. Enhancer 28; enhancer 25/Emanon® 4110 [POE(10) C 17 H 35 COOH] = 80/20. Enhancer 29; enhancer 25/Rheodol® TWL-120 [POE(20) C 11 H 23 COO sorbitan ester] = 80/20. Enhancer 30; a compound represented by the following formula was used: Enhancer 31; enhancer 30/Emulgen® 703 [a mixture of POE(3) C 12 H 25 OH and POE(3) C 13 H 27 OH] = 75/25. Enhancer 32; enhancer 30/Emanon® 1112 [POE(12) C 11 H 23 COOH] = 75/25. Enhancer 33; enhancer 30/Rheodol® TWO-120 [POE(20) C 17 H 33 COO sorbitan ester] = 75/25. Enhancer 34; didecyldimethylammonium chloride. Enhancer 35; monolauryltrimethylammonium chloride. Enhancer 36; dilauryldihydroxyethylammonium chloride. Enhancer 37; trimethylcocoammonium chloride. Enhancer 38; a compound represented by the following formula was used: Enhancer 39; enhancer 38/Emulgen® 909 = 80/20. Enhancer 40; enhancer 38/Emulgen® 103 = 80/20. Enhancer 41; enhancer 38/Emanon® 4110 = 80/20. Enhancer 42; enhancer 38/Rheodol® TWO-120 = 80/20. Enhancer 43; a compound represented by the following formula was used: Enhancer 44; enhancer 43/Emulgen® 703 = 75/25. Enhancer 45; enhancer 43/Emanon® 1112 = 75/25. Enhancer 46; enhancer 43/Rheodol® TWO-120 = 75/25. The express on "POE" as used herein is an abbreviation of "polyoxyethylene" and each value given in the parentheses is an average addition mole number of oxyethylene. In the above-described enhancers, the composition ratio is by weight. No. of enhancer Herbicidal ratio (%) Karmex® wettable powder Herbiace® water-soluble powder Roundup® liquid formulation Invention product 25 98.0 98.9 99.2 26 98.0 98.9 99.1 27 99.3 99.0 99.1 28 99.4 99.2 97.5 29 99.4 99.1 99.3 30 98.9 98.9 99.0 31 99.3 99.3 97.8 32 99.1 99.3 99.0 33 99.0 99.1 99.1 Comparative product 34 63.5 70.0 73.5 35 44.5 72.2 76.1 36 60.3 70.1 71.1 37 50.3 65.8 75.3 Invention product 38 98.5 98.7 99.2 39 98.5 99.3 99.1 40 98.5 99.4 98.7 41 96.7 99.5 98.3 42 98.5 98.3 98.5 43 99.3 98.3 99.4 44 99.2 98.5 99.3 45 99.0 99.0 99.3 46 99.4 99.1 99.0 none 18.4 67.5 68.5 Example 13 The same test as the one effected in Example 2 was carried out, except that the enhancers 25 to 46, which were employed in Example 12, were used to prepare agricultural chemical compositions. Table 13 shows the results. No. of enhancer Acaricidal ratio (%) Nissorun V® emulsion Osadan® wettable powder Invention product 25 98.8 98.8 26 97.8 97.8 27 100 97.8 28 100 98.8 29 100 100 30 98.8 100 31 98.8 100 32 98.8 99.2 33 98.8 100 Comparative product 34 50.0 52.2 35 50.0 46.5 36 48.9 52.2 37 50.0 74.4 Invention product 38 97.8 97.8 39 97.8 98.8 40 97.8 97.8 41 100 100 42 98.8 100 43 92.2 92.2 44 100 92.2 45 100 100 46 100 100 none 44.4 38.9 Example 14 The same test as the one effected in Example 3 was carried out, except that the enhancers 25 to 46, which were employed in Example 12, were used to prepare agricultural chemical compositions. Table 14 shows the results. No. of enhancer Insecticidal ratio (%) Sumithion® emulsion Malathion® emulsion Invention product 25 90.0 100 26 90.0 100 27 93.3 93.3 28 93.3 90.0 29 100 100 30 100 93.3 31 93.3 100 32 100 96.7 33 93.3 96.7 Comparative product 34 60.0 50.0 35 50.0 53.3 36 60.0 53.3 37 43.3 40.0 Invention product 38 100 96.7 39 93.3 93.3 40 96.7 100 41 100 100 42 96.7 100 43 96.7 96.7 44 100 96.7 45 100 93.3 46 93.3 93.3 control lot 40.0 50.0 Examples 12, 13 and 14 show the tests wherein the efficacies of the enhancers for agricultural chemicals according to the present invention were compared with those of common cationic surfactants (comparative products) as enhancers for agricultural chemicals. As Tables 12 to 14 clearly indicate, the enhancers for agricultural chemicals of the present invention exerted remarkable effects and thus were usable on a practical level. In contrast, the comparative products somewhat enhanced the efficacies of the agricultural chemicals but were not effective on a practical level. Accordingly, it is observed that the enhancers for agricultural chemicals of the present invention would specifically enhance the efficacies of agricultural chemicals as compared with common cationic surfactants. Example 15 The same test as the one effected in Example 12 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 25 and 38 listed in Example 12 each in a dose as specified in Table 15. Table 15 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 25 2000 200 1/0.1 82.3 2 2000 1000 1/0.5 95.6 3 2000 2000 1/1.0 97.8 4 2000 10000 1/5 99.0 5 2000 24000 1/12 98.7 6 2000 30000 1/15 99.1 7 2000 60000 1/30 99.0 8 2000 0 56.5 9 0 0 0 10 Enhancer 38 2000 200 1/0.1 78.5 11 2000 1000 1/0.5 90.2 12 2000 2000 1/1.0 95.6 13 2000 10000 1/5 98.8 14 2000 24000 1/12 99.1 15 2000 30000 1/15 99.0 16 2000 60000 1/30 99.1 17 2000 0 56.5 18 0 0 0 Example 16 The same test as the one effected in Example 12 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 30 and 43 listed in Example 12 each in a dose as specified in Table 16. Table 16 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 30 2000 200 1/0.1 75.6 2 2000 1000 1/0.5 88.4 3 2000 2000 1/1.0 93.8 4 2000 10000 1/5 97.7 5 2000 24000 1/12.0 99.1 6 2000 60000 1/30 99.3 7 2000 80000 1/40 99.2 8 2000 0 56.5 9 0 0 0 10 Enhancer 43 2000 200 1/0.1 78.5 11 2000 1000 1/0.5 93.4 12 2000 2000 1/1.0 99.1 13 2000 10000 1/5 98.9 14 2000 24000 1/12.0 99.2 15 2000 60000 1/30 99.1 16 2000 80000 1/40 98.1 17 2000 0 56.5 18 0 0 0 Example 17 The same test as the one effected in Example 12 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 26 and 39 listed in Example 12 each in a dose as specified in Table 17. Table 17 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 26 2000 200 1/0.1 81.5 2 2000 1000 1/0.5 94.3 3 2000 2000 1/1.0 98.2 4 2000 10000 1/5 98.9 5 2000 24000 1/12 99.2 6 2000 30000 1/15 99.0 7 2000 80000 1/40 99.1 8 2000 0 56.5 9 0 0 0 10 Enhancer 39 2000 200 1/0.1 83.2 11 2000 1000 1/0.5 95.5 12 2000 2000 1/1.0 99.1 13 2000 10000 1/5 99.0 14 2000 24000 1/12 89.9 15 2000 30000 1/15 99.0 16 2000 80000 1/40 99.1 17 2000 0 56.5 18 0 0 0 Example 18 The same test as the one effected in Example 14 was carried out by using a Sumithion® emulsion as an insecticide and the enhancers 25 and 38 listed in Example 12 each in a dose as specified in Table 18. Table 18 shows the results. Test no. Enhancer Insecticide content (ppm) Enhancer content (ppm) Insecticide/enhancer weight ratio Insecticidal ratio (%) 1 Enhancer 25 250 25 1/0.1 83.3 2 250 125 1/0.5 93.3 3 250 250 1/1.0 93.3 4 250 500 1/2.0 100 5 250 1000 1/4.0 100 6 250 2500 1/10 100 7 250 5000 1/20 100 8 250 0 46.7 9 0 0 0 10 Enhancer 38 250 25 1/0.1 83.3 11 250 125 1/0.5 93.3 12 250 250 1/1.0 100 13 250 500 1/2.0 100 14 250 1000 1/4.0 100 15 250 2500 1/10 100 16 250 5000 1/20 100 17 250 0 46.7 18 0 0 0 Example 19 The same test as the one effected in Example 13 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 29 and 42 listed in Example 12 each in a dose as specified in Table 19. Table 19 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 29 100 10 1/0.1 77.8 2 100 50 1/0.5 91.1 3 100 100 1/1.0 91.1 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 42 100 10 1/0.1 77.8 11 100 50 1/0.5 94.4 12 100 100 1/1.0 94.4 13 100 200 1/2.0 100 14 100 1000 1/10 100 15 100 1500 1/15 100 16 100 2000 1/20 100 17 100 0 52.3 18 0 0 2.2 Example 20 The same test as the one effected in Example 13 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 31 and 44 listed in Example 12 each in a dose as specified in Table 20. Table 20 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 31 100 10 1/0.1 66.7 2 100 50 1/0.5 83.3 3 100 100 1/1.0 97.8 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 0 10 Enhancer 44 100 10 1/0.1 75.6 11 100 50 1/0.5 88.9 12 100 200 1/2.0 94.4 13 100 1000 1/10 100 14 100 0 52.3 15 0 0 0 Production Example 3 A four-neck flask provided with a stirrer, a thermometer and a dehydrating tube was charged with 66 g of N-(2-hydroxyethyl)-N-methyl-1,3-propylenediamine, which had been synthesized from an adduct of N-methylethanolamine with acrylonitrile in accordance with a known method [see J. Org. Chem., 26 , 3409 (1960)], and 284 g of stearic acid. The mixture was heated to 180°C and maintained at this temperature for about 10 hours while distilling off the water thus formed. Then 300 g of the product thus obtained was dissolved in 60 g of isopropyl alcohol and fed into an autoclave provided with a stirrer, a thermometer and a pressure gauge. After injecting 28 g of methyl chloride thereinto, the mixture was reacted at 100°C for about 8 hours. After distilling off the isopropyl alcohol under reduced pressure, 320 g of the target compound was obtained. Based on the NMR and IR spectra, it was confirmed that this product had the following chemical structure. This compound will be referred to as the enhancer 47 hereinafter. Example 21 The same test as the one effected in Example 1 was carried out, except that the enhancer 47 obtained in Production Example 3 and, the following enhancers 48 to 74 were used to prepare agricultural chemical compositions. Table 21 summarizes the results. Enhancer 48; enhancer 47/Emulgen® 909 [POE(9) nonyl phenol ether] = 80/20. Enhancer 49; enhancer 47/Emulgen® 103 [POE(3) C 12 H 25 OH] = 80/20. Enhancer 50; enhancer 47/Emanon® 4110 [POE(10) C 17 H 35 COOH] = 80/20. Enhancer 51; enhancer 47/Rheodol® TWL-120 [POE(20) C 11 H 23 COO sorbitan ester] = 80/20. Enhancer 52; a compound represented by the following formula was used: Enhancer 53; enhancer 52/Emulgen® 703 [a mixture of POE(3) C 12 H 25 OH and POE(3) C 13 H 27 OH] = 75/25. Enhancer 54; enhancer 52/Emanon® 1112 [POE(12) C 11 H 23 COOH] = 75/25. Enhancer 55; enhancer 52/Rheodol® TWO-120 [POE(20) C 17 H 33 COO sorbitan ester] = 75/25. Enhancer 56; didecyldimethylammonium chloride. Enhancer 57; monolauryltrimethylammonium chloride. Enhancer 58; dilauryldihydroxyethylammonium chloride. Enhancer 59; trimethylcocoammonium chloride. Enhancer 60; a compound represented by the following formula was used: Enhancer 61; enhancer 60/Emulgen® 909 = 80/20. Enhancer 62; enhancer 60/Emulgen® 103 = 80/20. Enhancer 63; enhancer 60/Emanon® 4110 = 80/20. Enhancer 64; enhancer 60/Rheodol® TWO-120 = 80/20. Enhancer 65; a compound represented by the following formula was used: Enhancer 66; enhancer 65/Emulgen® 703 = 75/25. Enhancer 67; enhancer 65/Emanon® 1112 = 75/25. Enhancer 68; enhancer 65/Rheodol® TWO-120 = 75/25. Enhancer 69; a compound represented by the following formula was used: Enhancer 70; enhancer 69/Emulgen® 707 [POE(7) sec-C 12 ,C 13 ether] = 75/25. Enhancer 71; enhancer 69/Rheodol® TWO-120 = 75/25. Enhancer 72; a compound represented by the following formula was used: Enhancer 73; enhancer 72/Emulgen® 909 = 80/20. Enhancer 74; enhancer 72/Rheodol® TWO-120 = 80/20. The expression "POE" as used herein is an abbreviation of "polyoxyethylene" and each value given in the parentheses is an average addition mole number of oxyethylene. In enhancer compositions, the composition ratio is by weight. No. of enhancer Herbicidal ratio (%) Karmex® wettable powder Herbiace® water-soluble powder Roundup® liquid formulation Invention product 47 97.8 97.6 99.1 48 97.5 99.1 99.0 49 99.1 99.1 99.0 50 99.2 98.5 97.5 51 99.0 98.5 98.9 52 99.0 98.9 99.1 53 98.5 99.1 99.1 54 98.9 98.6 98.7 55 99.1 99.2 99.3 Comparative product 56 63.5 70.0 69.5 57 44.5 72.2 70.0 58 60.3 70.1 71.1 59 50.3 67.8 70.5 Invention product 60 99.3 98.7 98.7 61 98.5 99.3 98.7 61 98.5 99.1 99.0 63 98.9 99.0 99.0 64 98.9 98.7 98.8 65 99.3 98.3 98.8 66 99.2 98.5 98.8 67 99.4 98.2 99.3 68 98.9 98.5 99.2 69 99.7 99.5 99.3 70 99.1 99.2 99.0 71 99.2 99.1 99.1 72 98.2 97.3 98.9 73 99.1 97.8 99.2 74 97.6 98.5 97.9 none 18.4 67.5 68.5 Example 22 The same test as the one effected in Example 2 was carried out, except that the enhancers 47 to 74, which were employed in Example 21, were used to prepare agricultural chemical compositions. Table 22 shows the results. No. of enhancer Acaricidal ratio (%) Nissorun V® emulsion Osadan® wettable powder Invention product 47 98.8 100 48 97.8 100 49 98.8 100 50 100 98.8 51 100 98.8 52 100 98.8 53 100 97.8 54 100 99.2 55 97.8 100 Comparative product 56 50.0 52.2 57 50.0 46.5 58 48.9 52.2 59 50.0 74.4 Invention product 60 97.8 97.8 61 97.8 98.8 62 98.8 100 63 100 100 64 100 100 65 100 100 66 100 97.8 67 100 98.8 68 100 97.8 69 100 98.9 70 99.4 100 71 100 100 72 96.7 97.8 73 100 96.7 74 93.3 95.6 none 44.4 38.9 Example 23 The same test as the one effected in Example 3 was carried out, except that the enhancers 47 to 74, which were employed in Example 21, were used to prepare agricultural chemical compositions. Table 23 shows the results. No. of enhancer Insecticidal ratio (%) Sumithion® emulsion Malathion® emulsion Invention product 47 90.0 90.0 48 100 100 49 93.3 93.3 50 93.3 96.7 51 93.3 96.7 52 90.0 90.0 53 100 100 54 100 100 55 100 100 Comparative product 56 60.0 50.0 57 50.0 53.3 58 53.3 60.0 59 40.0 43.3 Invention product 60 100 100 61 93.3 100 62 93.3 96.7 63 96.7 93.3 64 100 100 65 100 96.7 66 100 100 67 93.3 100 68 93.3 93.3 69 95.5 97.8 70 100 100 71 100 100 72 93.3 100 73 100 96.7 74 93.3 93.3 control lot 40.0 50.0 Examples 21, 22 and 23 show the tests wherein the efficacies of the enhancers for agricultural chemicals according to the present invention were compared with those of common cationic surfactants (comparative products) as enhancers for agricultural chemicals. As Tables 21 to 23 clearly indicate, the enhancers for agricultural chemicals of the present invention exerted remarkable effects and thus were usable on a practical level. In contrast, the comparative products somewhat enhanced the efficacies of the agricultural chemicals but were not effective on a practical level. Accordingly, it is observed that the enhancers for agricultural chemicals of the present invention would specifically enhance the efficacies of agricultural chemicals as compared with common cationic surfactants. Example 24 The same test as the one effected in Example 21 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 47 and 60 listed in Example 21 each in a dose as specified in Table 24. Table 24 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 47 2000 200 1/0.1 82.3 2 2000 1000 1/0.5 95.5 3 2000 2000 1/1.0 97.8 4 2000 10000 1/5 98.9 5 2000 24000 1/12 99.3 6 2000 30000 1/15 99.0 7 2000 60000 1/30 99.1 8 2000 0 50.6 9 0 0 0 10 Enhancer 60 2000 200 1/0.1 85.5 11 2000 1000 1/0.5 98.5 12 2000 2000 1/1.0 98.9 13 2000 10000 1/5 98.7 14 2000 24000 1/12 99.3 15 2000 30000 1/15 99.1 16 2000 60000 1/30 98.8 17 0 0 0 Example 25 The same test as the one effected in Example 21 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 52 and 65 listed in Example 21 each in a dose as specified in Table 25. Table 25 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 52 2000 200 1/0.1 74.5 2 2000 1000 1/0.5 90.0 3 2000 2000 1/1.0 99.0 4 2000 10000 1/5 98.1 5 2000 24000 1/12.0 99.3 6 2000 60000 1/30 99.2 7 2000 80000 1/40 99.1 8 2000 0 56.5 9 0 0 0 10 Enhancer 65 2000 200 1/0.1 83.5 11 2000 1000 1/0.5 95.6 12 2000 2000 1/1.0 99.3 13 2000 10000 1/5 99.0 14 2000 24000 1/12.0 99.0 15 2000 60000 1/30 98.9 16 2000 80000 1/40 99.2 17 2000 0 56.5 18 0 0 0 Example 26 The same test as the one effected in Example 21 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 48 and 61 listed in Example 21 each in a dose as specified in Table 26. Table 26 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 48 2000 200 1/0.1 78.6 2 2000 1000 1/0.5 94.5 3 2000 2000 1/1.0 98.0 4 2000 10000 1/5 99.1 5 2000 24000 1/12 99.0 6 2000 30000 1/15 99.3 7 2000 80000 1/40 99.1 8 2000 0 56.5 9 0 0 0 10 Enhancer 61 2000 200 1/0.1 83.2 11 2000 1000 1/0.5 95.1 12 2000 2000 1/1.0 99.3 13 2000 10000 1/5 99.0 14 99.1 2000 24000 1/12 15 2000 30000 1/15 99.2 16 2000 80000 1/40 98.8 17 2000 0 56.5 18 0 0 0 Example 27 The same test as the one effected in Example 23 was carried out by using a Sumithion® emulsion as an insecticide and the enhancers 47 and 60 listed in Example 21 each in a dose as specified in Table 27. Table 27 shows the results. Test no. Enhancer Insecticide content (ppm) Enhancer content (ppm) Insecticide/enhancer weight ratio Insecticidal ratio (%) 1 Enhancer 47 250 25 1/0.1 83.3 2 250 125 1/0.5 93.3 3 250 250 1/1.0 100 4 250 500 1/2.0 100 5 250 1000 1/4.0 100 6 250 2500 1/10 100 7 250 5000 1/20 100 8 250 0 53.3 9 0 0 0 10 Enhancer 60 250 25 1/0.1 80.0 11 250 125 1/0.5 90.0 12 250 250 1/1.0 100 13 250 500 1/2.0 100 14 250 1000 1/4.0 100 15 250 2500 1/10 100 16 250 5000 1/20 100 17 250 0 53.3 18 0 0 0 Example 28 The same test as the one effected in Example 22 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 51 and 64 listed in Example 21 each in a dose as specified in Table 28. Table 28 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 51 100 10 1/0.1 83.3 2 100 50 1/0.5 91.1 3 100 100 1/1.0 100 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 64 100 10 1/0.1 77.8 11 100 50 1/0.5 88.9 12 100 100 1/1.0 94.4 13 100 200 1/2.0 100 14 100 100 1000 1/10 15 100 1500 1/15 100 16 100 2000 1/20 100 17 100 0 52.3 18 0 0 2.2 Example 29 The same test as the one effected in Example 22 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 53 and 66 listed in Example 21 each in a dose as specified in Table 29. Table 29 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 53 100 10 1/0.1 68.9 2 100 50 1/0.5 83.3 3 100 100 1/1.0 94.4 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 66 100 10 1/0.1 72.2 11 100 50 1/0.5 83.3 12 100 200 1/2.0 100 13 100 1000 1/10 100 14 100 0 52.3 15 0 0 2.2 Example 30 The same test as the one effected in Example 21 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 69 and 71 listed in Example 21 each in a dose as specified in Table 30. Table 30 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 69 2000 200 1/0.1 88.2 2 2000 1000 1/0.5 95.6 3 2000 2000 1/1.0 99.3 4 2000 10000 1/5 99.2 5 2000 24000 1/12 99.2 6 2000 30000 1/15 99.3 7 2000 60000 1/30 99.0 8 2000 0 56.5 9 0 0 0 10 Enhancer 71 2000 200 1/0.1 90.4 11 2000 1000 1/0.5 97.6 12 2000 2000 1/1.0 98.5 13 2000 10000 1/5 99.2 2000 24000 1/12 14 99.0 15 2000 30000 1/15 98.9 16 2000 60000 1/30 99.0 17 0 0 0 Example 31 The same test as the one effected in Example 21 was carried out by using a Roundup® liquid formulation as a herbicide and the enhancers 72 and 73 listed in Example 21 each in a dose as specified in Table 31. Table 31 shows the results. Test no. Enhancer Herbicide content (ppm) Enhancer content (ppm) Herbicide/enhancer weight ratio Herbicidal ratio (%) 1 Enhancer 72 2000 200 1/0.1 87.6 2 2000 1000 1/0.5 89.2 3 2000 2000 1/1.0 99.1 4 2000 10000 1/5 98.6 5 2000 24000 1/12 98.8 6 2000 30000 1/15 97.5 7 2000 60000 1/30 97.9 8 2000 0 56.5 9 0 0 0 10 Enhancer 73 2000 200 1/0.1 85.6 11 2000 1000 1/0.5 88.3 12 2000 2000 1/1.0 97.6 13 2000 10000 1/5 98.6 14 2000 24000 1/12 99.0 15 2000 30000 1/15 98.2 16 2000 60000 1/30 98.8 17 0 0 0 Example 32 The same test as the one effected in Example 22 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 69 and 70 listed in Example 21 each in a dose as specified in Table 32. Table 32 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 69 100 10 1/0.1 85.3 2 100 50 1/0.5 92.4 3 100 100 1/1.0 100 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 70 100 10 1/0.1 80.6 11 100 50 1/0.5 89.9 12 100 100 1/1.0 95.5 13 100 200 1/2.0 100 14 100 1000 1/10 100 15 100 1500 1/15 100 16 100 2000 1/20 100 17 100 0 52.3 18 0 0 2.2 Example 33 The same test as the one effected in Example 22 was carried out by using an Osadan® wettable powder as an acaricide and the enhancers 72 and 73 listed in Example 21 each in a dose as specified in Table 33. Table 33 shows the results. Test no. Enhancer Acaricide content (ppm) Enhancer content (ppm) Acaricide/enhancer weight ratio Acaricidal ratio (%) 1 Enhancer 72 100 10 1/0.1 93.3 2 100 50 1/0.5 97.8 3 100 100 1/1.0 100 4 100 200 1/2.0 100 5 100 1000 1/10 100 6 100 1500 1/15 100 7 100 2000 1/20 100 8 100 0 52.3 9 0 0 2.2 10 Enhancer 73 100 10 1/0.1 92.2 11 100 50 1/0.5 96.7 12 100 100 1/1.0 98.9 13 100 200 1/2.0 100 14 100 1000 1/10 100 15 100 1500 1/15 100 16 100 2000 1/20 100 17 100 0 52.3 18 0 0 2.2 Example 34 The same test as the one effected in Example 23 was carried out by using a Sumithion® emulsion as an insecticide and the enhancers 69 and 71 listed in Example 21 each in a dose as specified in Table 34. Table 34 shows the results. Test no. Enhancer Insecticide content (ppm) Enhancer content (ppm) Insecticide/enhancer weight ratio Insecticidal ratio (%) 1 Enhancer 69 250 25 1/0.1 82.5 2 250 125 1/0.5 96.1 3 250 250 1/1.0 100 4 250 500 1/2.0 100 5 250 1000 1/4.0 100 6 250 2500 1/10 100 7 250 5000 1/20 100 8 250 0 53.3 9 0 0 0 10 Enhancer 71 250 25 1/0.1 89.2 11 250 125 1/0.5 98.0 12 250 250 1/1.0 100 13 250 500 1/2.0 100 14 250 1000 1/4.0 100 15 250 2500 1/10 100 16 250 5000 1/20 100 17 250 0 53.3 18 0 0 0 Example 35 The same test as the one effected in Example 23 was carried out by using a Sumithion® emulsion as an insecticide and the enhancers 72 and 73 listed in Example 21 each in a dose as specified in Table 35. Table 35 shows the results. Test no. Enhancer Insecticide content (ppm) Enhancer content (ppm) Insecticide/enhancer weight ratio Insecticidal ratio (%) 1 Enhancer 72 250 25 1/0.1 86.7 2 250 125 1/0.5 93.3 3 250 250 1/1.0 100 4 250 500 1/2.0 100 5 250 1000 1/4.0 100 6 250 2500 1/10 100 7 250 5000 1/20 100 8 250 0 53.3 9 0 0 0 10 Enhancer 73 250 25 1/0.1 90.0 11 250 125 1/0.5 93.3 12 250 250 1/1.0 100 13 250 500 1/2.0 100 14 250 1000 1/4.0 100 15 250 2500 1/10 100 16 250 5000 1/20 100 17 250 0 53.3 18 0 0 0 The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims: An agricultural chemical composition comprising an agricultural chemical and an effective amount for enhancing the effectiveness of the agricultural chemical of an enhancer compound selected from the group consisting of compounds represented by the following general formulae (I) to (III): wherein A represents a hydrogen atom, -CH 2 CH 2 CN, -CH 2 CH 2 COOH, (wherein n is 2 to 9, p is 0 to 30, R or each of the plural R's is a hydrogen atom or a methyl group and R 2 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -C m H 2m NH-COR 2 (wherein m is 2 to 9 and R 2 is as described above) or (wherein r is 2 to 6 and m, p, R and R 2 are described above); B, C and D are either the same or different from one another and each represents a hydrogen atom, a methyl group, an ethyl group, -(C i H 2i 0) j -COR 3 (wherein i is 2 to 6, j is 1 to 10 and R 3 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -CH 2 COO ⊖ , -CH 2 COOH, -(C i H 2i 0) j -H (wherein i and j are as described above), -CH 2 CH(OH)CH 2 SO 3 ⊖ or with the proviso that only one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ or B, C and D are other than -CH 2 COO ⊖ and -CH 2 CH(OH)CH 2 SO 3 ⊖ ; R 1 represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ represents a counter ion; with the proviso that when one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ , X ⊖ should be deleted from the formula (I), wherein Y and Z are either the same or different from each other and each represents an alkyl or alkenyl group having 6 to 30 carbon atoms, (wherein p is 0 to 30, R 5 or each of the plural R 5 's is a hydrogen atom or a methyl group and R 6 is an alkyl or alkenyl group having 5 to 29 carbon atoms), -C 3 H 6 NHCOR 6 (wherein R 6 is as described above), -C 3 H 6 OR 6 (wherein R 6 is as described above), -CH 2 CH(OH)CH 2 OR 6 (wherein R 6 is as described above) or (wherein m is 2 to 9, n is 2 to 9 and p, R 5 and R 6 are described above), with the proviso that Y and Z do not simultaneously represent alkyl and/or alkenyl groups having 6 to 30 carbon atoms; R 4 represents an alkyl group having 1 to 4 carbon atoms or (wherein q is 1 to 30 and R 5 is as described above); and X ⊖ represents a counter ion, and wherein R 7 and R 8 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or (wherein q is 1 to 30 and R 10 or each of the plural R 10 's is a hydrogen atom or a methyl group); R 9 represents an alkyl group having 6 to 36 carbon atoms, (wherein n is 2 to 9, p is 0 to 30, R 11 is an alkyl group having 5 to 35 carbon atoms and R 10 is as described above), -C m H 2m NH-COR 11 (wherein m is 2 to 9 and R 11 is as described above) or (wherein r is 2 to 6 and m, p, R 10 and R 11 are described above); W represents (wherein p, R 10 and R 11 are as described above), -NH-COR 11 (wherein R 11 is as described above) or (wherein p, r, R 10 and R 11 are as described above); n is 2 to 9; and X ⊖ is a counter ion; under the proviso that the agricultural chemical is not a guanidine compound. The agricultural chemical composition as claimed in claim 1, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the agricultural chemical(s) is from 0.05 to 50. The agricultural chemical composition as claimed in claim 1, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the agricultural chemical(s) is from 0.05 to 20. The agricultural chemical composition as claimed in claim 1, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the agricultural chemical(s) is from 0.1 to 10. The agricultural chemical composition as claimed in claim 1, wherein the agricultural chemical is a fungicide, an insecticide, an acaricide, a herbicide or a plant growth regulator. The agricultural chemical composition as claimed in claim 1, which further comprises a surfactant other than the compounds represented by the formulae (I) to (III). The agricultural chemical composition as claimed in claim 6, wherein the surfactant is a nonionic surfactant. The agricultural chemical composition as claimed in claim 1, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the surfactant(s) other than the compounds represented by the formulae (I) to (III) is from 1/10 to 50/1. A method for enhancing the effectiveness of an agricultural chemical which comprises applying an enhancer compound selected from the group consisting of compounds represented by the following general formulae (I) to (III) with an agricultural chemical to a locus which would benefit from such treatment: wherein A represents a hydrogen atom, -CH 2 CH 2 CN, -CH 2 CH 2 COOH, (wherein n is 2 to 9, p is 0 to 30, R or each of the plural R's is a hydrogen atom or a methyl group and R 2 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -C m H 2m NH-COR 2 (wherein m is 2 to 9 and R 2 is as described above) or (wherein r is 2 to 6 and m, p, R and R 2 are described above); B, C and D are either the same or different from one another and each represents a hydrogen atom, a methyl group, an ethyl group, -(C i H 2i 0) j -COR 3 (wherein i is 2 to 6, j is 1 to 10 and R 3 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -CH 2 COO ⊖ , -CH 2 COOH, -(C i H 2i 0) j -H (wherein i and j are as described above), -CH 2 CH(OH)CH 2 SO 3 ⊖ or with the proviso that only one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ or B, C and D are other than -CH 2 COO ⊖ and -CH 2 CH(OH)CH 2 SO 3 ⊖ ; R 1 represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ represents a counter ion; with the proviso that when one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ , X ⊖ should be deleted from the formula (I), wherein Y and Z are either the same or different from each other and each represents an alkyl or alkenyl group having 6 to 30 carbon atoms, (wherein p is 0 to 30, R 5 or each of the plural R 5 's is a hydrogen atom or a methyl group and R 6 is an alkyl or alkenyl group having 5 to 29 carbon atoms), -C 3 H 6 NHCOR 6 (wherein R 6 is as described above), -C 3 H 6 OR 6 (wherein R 6 is as described above), -CH 2 CH(OH)CH 2 OR 6 (wherein R 6 is as described above) or (wherein m is 2 to 9, n is 2 to 9 and p, R 5 and R 6 are described above), with the proviso that Y and Z do not simultaneously represent alkyl and/or alkenyl groups having 6 to 30 carbon atoms; R 4 represents an alkyl group having 1 to 4 carbon atoms or (wherein q is 1 to 30 and R 5 is as described above); and X ⊖ represents a counter ion, and wherein R 7 and R 8 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or (wherein q is 1 to 30 and R 10 or each of the plural R 10 's is a hydrogen atom or a methyl group); R 9 represents an alkyl group having 6 to 36 carbon atoms, (wherein n is 2 to 9, p is 0 to 30, R 11 is an alkyl group having 5 to 35 carbon atoms and R 10 is as described above), -C m H 2m NH-COR 11 (wherein m is 2 to 9 and R 11 is as described above) or (wherein r is 2 to 6 and m, p, R 10 and R 11 are described above); W represents (wherein p, R 10 and R 11 are as described above), -NH-COR 11 (wherein R 11 is as described above) or (wherein p, r, R 10 and R 11 are as described above); n is 2 to 9; and X ⊖ is a counter ion. The method as claimed in claim 9, wherein the enhancer and the agricultural chemical are diluted with water or a liquid carrier before applying. The method as claimed in claim 9, wherein an appropriate amount of a surfactant other than the compounds represented by the formulae (I) to (III) is further added to the composition comprising the agricultural chemical. The method as claimed in claim 11, wherein the surfactant is a nonionic surfactant. The method as claimed in claim 11, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the surfactant(s) other than the compounds represented by the formulae (I) to (III) is from 1/10 to 50/1. The method as claimed in claim 9, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the agricultural chemical(s) is from 0.05 to 50. The method as claimed in claim 9, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the agricultural chemical(s) is from 0.05 to 20. The method as claimed in claim 9, wherein the weight ratio of the compound(s) represented by the above general formulae (I) to (III) to the agricultural chemical is from 0.1 to 10. The method as claimed in claim 9, wherein the agricultural chemical is a fungicide. The method as claimed in claim 9, wherein the agricultural chemical is an insecticide. The method as claimed in claim 9, wherein the agricultural chemical is an acaricide. The method as claimed in claim 9, wherein the agricultural chemical is a herbicide. The method as claimed in claim 9, wherein the agricultural chemical is a plant growth regulator. A use of a compound selected from the group consisting of compounds represented by the following general formulae (I) to (III) for the preparation of an agricultural chemical composition: wherein A represents a hydrogen atom, -CH 2 CH 2 CN, -CH 2 CH 2 COOH, (wherein n is 2 to 9, p is 0 to 30, R or each of the plural R's is a hydrogen atom or a methyl group and R 2 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -C m H 2m NH-COR 2 (wherein m is 2 to 9 and R 2 is as described above) or (wherein r is 2 to 6 and m, p, R and R 2 are described above); B, C and D are either the same or different from one another and each represents a hydrogen atom, a methyl group, an ethyl group, -(C i H 2i 0) j -COR 3 (wherein i is 2 to 6, j is 1 to 10 and R 3 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -CH 2 COO ⊖ , -CH 2 COOH, -(C i H 2i 0) j -H (wherein i and j are as described above), -CH 2 CH(OH)CH 2 SO 3 ⊖ or with the proviso that only one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ or B, C and D are other than -CH 2 COO ⊖ and -CH 2 CH(OH)CH 2 SO 3 ⊖ ; R 1 represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ represents a counter ion; with the proviso that when one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ , X ⊖ should be deleted from the formula (I), wherein Y and Z are either the same or different from each other and each represents an alkyl or alkenyl group having 6 to 30 carbon atoms, (wherein p is 0 to 30, R 5 or each of the plural R 5 's is a hydrogen atom or a methyl group and R 6 is an alkyl or alkenyl group having 5 to 29 carbon atoms), -C 3 H 6 NHCOR 6 (wherein R 6 is as described above), -C 3 H 6 OR 6 (wherein R 6 is as described above), -CH 2 CH(OH)CH 2 OR 6 (wherein R 6 is as described above) or (wherein m is 2 to 9, n is 2 to 9 and p, R 5 and R 6 are described above), with the proviso that Y and Z do not simultaneously represent alkyl and/or alkenyl groups having 6 to 30 carbon atoms; R 4 represents an alkyl group having 1 to 4 carbon atoms or (wherein q is 1 to 30 and R 5 is as described above); and X ⊖ represents a counter ion, and wherein R 7 and R 8 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or (wherein q is 1 to 30 and R 10 or each of the plural R 10 's is a hydrogen atom or a methyl group); R 9 represents an alkyl group having 6 to 36 carbon atoms, (wherein n is 2 to 9, p is 0 to 30, R 11 is an alkyl group having 5 to 35 carbon atoms and R 10 is as described above), -C m H 2m NH-COR 11 (wherein m is 2 to 9 and R 11 is as described above) or (wherein r is 2 to 6 and m, p, R 10 and R 11 are described above); W represents (wherein p, R 10 and R 11 are as described above), -NH-COR 11 (wherein R 11 is as described above) or (wherein p, r, R 10 and R 11 are as described above); n is 2 to 9; and X ⊖ is a counter ion; under the proviso that the agricultural chemical composition does not contain a guanidine compound. The use of an enhancer for agricultural chemicals comprising a compound selected from the group consisting of compounds represented by the following general formulae (I) to (III): wherein A represents a hydrogen atom, -CH 2 CH 2 CN, -CH 2 CH 2 COOH, (wherein n is 2 to 9, p is 0 to 30, R or each of the plural R's is a hydrogen atom or a methyl group and R 2 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -C m H 2m NH-COR 2 (wherein m is 2 to 9 and R 2 is as described above) or (wherein r is 2 to 6 and m, p, R and R 2 are described above); B, C and D are either the same or different from one another and each represents a hydrogen atom, a methyl group, an ethyl group, -(C i H 2i 0) j -COR 3 (wherein i is 2 to 6, j is 1 to 10 and R 3 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -CH 2 COO ⊖ , -CH 2 COOH, -(C i H 2i 0) j -H (wherein i and j are as described above), -CH 2 CH(OH)CH 2 SO 3 ⊖ or with the proviso that only one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ or B, C and D are other than -CH 2 COO ⊖ and -CH 2 CH(OH)CH 2 SO 3 ⊖ ; R 1 represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ represents a counter ion; with the proviso that when one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ , X ⊖ should be deleted from the formula (I), wherein Y and Z are either the same or different from each other and each represents an alkyl or alkenyl group having 6 to 30 carbon atoms, (wherein p is 0 to 30, R 5 or each of the plural R 5 's is a hydrogen atom or a methyl group and R 6 is an alkyl or alkenyl group having 5 to 29 carbon atoms), -C 3 H 6 NHCOR 6 (wherein R 6 is as described above), -C 3 H 6 OR 6 (wherein R 6 is as described above), -CH 2 CH(OH)CH 2 OR 6 (wherein R 6 is as described above) or (wherein m is 2 to 9, n is 2 to 9 and p, R 5 and R 6 are described above), with the proviso that Y and Z do not simultaneously represent alkyl and/or alkenyl groups having 6 to 30 carbon atoms; R 4 represents an alkyl group having 1 to 4 carbon atoms or (wherein q is 1 to 30 and R 5 is as described above); and X ⊖ represents a counter ion, and wherein R 7 and R 8 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or (wherein q is 1 to 30 and R 10 or each of the plural R 10 's is a hydrogen atom or a methyl group); R 9 represents an alkyl group having 6 to 36 carbon atoms, (wherein n is 2 to 9, p is 0 to 30, R 11 is an alkyl group having 5 to 35 carbon atoms and R 10 is as described above), -C m H 2m NH-COR 11 (wherein m is 2 to 9 and R 11 is as described above) or (wherein r is 2 to 6 and m, p, R 10 and R 11 are described above); W represents (wherein p, R 10 and R 11 are as described above), -NH-COR 11 (wherein R 11 is as described above) or (wherein p, r, R 10 and R 11 are as described above); n is 2 to 9; and X ⊖ is a counter ion; for enhancing the effectiveness of an agricultural chemical. An agricultural chemical kit which comprises a container containing an enhancer for agricultural chemicals comprising a compound selected from the group consisting of compounds represented by the following general formulae (I) to (III): wherein A represents a hydrogen atom, -CH 2 CH 2 CN, -CH 2 CH 2 COOH, (wherein n is 2 to 9, p is 0 to 30, R or each of the plural R's is a hydrogen atom or a methyl group and R 2 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -C m H 2m NH-COR 2 (wherein m is 2 to 9 and R 2 is as described above) or (wherein r is 2 to 6 and m, p, R and R 2 are described above); B, C and D are either the same or different from one another and each represents a hydrogen atom, a methyl group, an ethyl group, -(C i H 2i 0) j -COR 3 (wherein i is 2 to 6, j is 1 to 10 and R 3 is an alkyl or alkenyl group having 4 to 30 carbon atoms), -CH 2 COO ⊖ , -CH 2 COOH, -(C i H 2i 0) j -H (wherein i and j are as described above), -CH 2 CH(OH)CH 2 SO 3 ⊖ or with the proviso that only one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ or B, C and D are other than -CH 2 COO ⊖ and -CH 2 CH(OH)CH 2 SO 3 ⊖ ; R 1 represents an alkyl or alkenyl group having 4 to 30 carbon atoms; and X ⊖ represents a counter ion; with the proviso that when one of B, C and D represents either -CH 2 COO ⊖ or -CH 2 CH(OH)CH 2 SO 3 ⊖ , X ⊖ should be deleted from the formula (I), wherein Y and Z are either the same or different from each other and each represents an alkyl or alkenyl group having 6 to 30 carbon atoms, (wherein p is 0 to 30, R 5 or each of the plural R 5 's is a hydrogen atom or a methyl group and R 6 is an alkyl or alkenyl group having 5 to 29 carbon atoms), -C 3 H 6 NHCOR 6 (wherein R 6 is as described above), -C 3 H 6 OR 6 (wherein R 6 is as described above), -CH 2 CH(OH)CH 2 OR 6 (wherein R 6 is as described above) or (wherein m is 2 to 9, n is 2 to 9 and p, R 5 and R 6 are described above), with the proviso that Y and Z do not simultaneously represent alkyl and/or alkenyl groups having 6 to 30 carbon atoms; R 4 represents an alkyl group having 1 to 4 carbon atoms or (wherein q is 1 to 30 and R 5 is as described above); and X ⊖ represents a counter ion, and wherein R 7 and R 8 are either the same or different from each other and each represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or (wherein q is 1 to 30 and R 10 or each of the plural R 10 's is a hydrogen atom or a methyl group); R 9 represents an alkyl group having 6 to 36 carbon atoms, (wherein n is 2 to 9, p is 0 to 30, R 11 is an alkyl group having 5 to 35 carbon atoms and R 10 is as described above), -C m H 2m NH-COR 11 (wherein m is 2 to 9 and R 11 is as described above) or (wherein r is 2 to 6 and m, p, R 10 and R 11 are described above); W represents (wherein p, R 10 and R 11 are as described above), -NH-COR 11 (wherein R 11 is as described above) or (wherein p, r, R 10 and R 11 are as described above); n is 2 to 9; and X ⊖ is a counter ion; and a container containing an agricultural chemical composition. An agricultural chemical kit according to claim 24, which further comprises a surfactant other than the compounds represented by the formulae (I) to (III). An agricultural chemical kit according to claim 25 which comprises a container containing the enhancer, a container containing a surfactant other than the compounds represented by the above formulae (I) to (III) and a container containing an agricultural chemical composition.

Inventors: HASEBE KEIKO, HIOKI YUICHI, KATOH TOHRU, NISHIMOTO UICHIRO, NISHIMOTO YOSHIFUMI, SOTOYA KOHSHIRO, TACHIZAWA OSAMU, TOMIFUJI TAKESHI, HASEBE, KEIKO, HIOKI, YUICHI, KATOH, TOHRU, NISHIMOTO, UICHIRO, NISHIMOTO, YOSHIFUMI, SOTOYA, KOHSHIRO, TACHIZAWA, OSAMU, TOMIFUJI, TAKESHI
Applicants: KAO CORP, KAO CORPORATION
Application year: 1993
Main classification: A01N25
IPC codes: A01N37, C07C233, A01N25