Patent EA-003143-B1 (EA)
Title: Concentrate herbicidal composition
Inventor: AGBAJE HENRY E
IPC: A01N25/30
Filed: 1999-03-08
Abstract: 1.A concentrate herbicidal composition comprising a first herbicide selected from glyphosate and glufosinate, a second herbicide that is a chloroacetamide, and a third herbicide that is a triazine, and a stabilizing amount of stabilizing system comprising at least two surfactants having hydrophilo-lipophilic balance (HLB) of about 5 to about 13, at least one of said surfactants being nonionic and the other being nonionic or anionic wherein the total amount of surfactants having HLB of about 5 to about 13 in the composition is more than 60% by weight of all surfactants in the composition wherein the composition is a suspoemulsion having an aqueous phase, an oil phase, and particles dispersed in the aqueous and/or oil phases, and wherein each one of said aqueous phase, oil phase, or dispersion of said solid particulate phase comprises at least one of said first second or third herbicide. 2. A composition of Claim 1 wherein said first herbicide is selected from the ammonium salt of glufosinate and the sodium, potassium, ammonium, dimethylammonium, isopropylammonium, monoethanolammonium and trimethylsulfonium salts of glyphosate. 3. A composition of Claim 2 wherein said first herbicide is selected from the ammonium salt of glufosinate. 4. A composition of Claim 2 wherein said chloroacetamide herbicide is metazachlor, 5. A composition of Claim 4 wherein the amount of solvent for said metolachlor is not more than 1% by weight of concentrated composition on the whole. 6. A composition of Claim 4 that further comprises a safener in an amount effective to reduce injury to crop plants caused by the said metolachlor. 7. A composition of Claim 6 wherein said safener is selected from benoxacor, fenclorim, flurazole, fluxofenim, furilazole and oxabetrinil. 8. A composition of Claim 7 wherein said safener is benoxacor or furilazole, and wherein said metolachlor and said safener are present in a ratio by weight of about 5: 1 to about 100: 1. 9. A composition of Claim 1 wherein said chloroacetamide herbicide is selected from acetochlor, alachlor, butachlor, dimethachlor, dimethenamid, metazachlor, metolachlor, pretilachlor, propachlor, propisochlor and thenylchlor. 10. A composition of Claim 9 wherein the chloroacetamide herbicide is acetochlor. 11. A composition of Claim 10 wherein the amount of organic solvent for said acetochlor is not more than 1% by weight of concentrated composition on the whole. 12. A composition of Claim 10 that further comprises a safener in an amount effective to reduce injury to crop plants caused by the said acetochlor. 13. A composition of Claim 12 wherein the said safener is furilazole. 14. A composition of Claim 1 wherein said triazine herbicide is selected from ametryn, atrazine, cyanazine, desmetryn, dimethametryn, prometon, prometryn, propazine, simazine, simetryn, terbumeton, terbuthylazine, terbutryn and trietazine. 15. A composition of Claim 14 wherein said triazine herbicide is atrazine. 16. A composition of Claim 15 wherein the chloroacetamide herbicide is acetochlor. 17. A method of controlling weeds in a field, comprising diluting a composition of Claim 16 in a suitable volume of water in a spray tank to form a spray composition, and applying said spray composition at a time To by means of a sprayer fed from the spray tank to a soil surface in the field and to foliage of weeds that have emerged above the soil surface, whereby (i) said emerged weeds are killed or controlled and (ii) emergence of weeds that would otherwise emerge during a period of about 10 days immediately following To is inhibited. 18. A composition of Claim 1 wherein (a) said first herbicide is selected from the sodium, potassium, ammonium, dimethylammonium, isopropylammonium, monoethanolammonium and trimethylsulfonium salts of glyphosate. (b) said chloroacetamide herbicide is acetochlor. (c) said triazine herbicide is atrazine; and (d) said emulsors comprise one ore more emusors, selected from ethoxylated amines, alkylsulfate ethers, phosphate esters, derivatives of sobitan, alkylphenols, and block copolymers of ethylene oxide and propylene oxide. 19. A method of controlling weeds in a field, comprising diluting a composition of Claim 1 in a suitable volume of water in a spray tank to form a spray composition, and applying said spray composition at a time T0 by means of a sprayer fed from the spray tank to a soil surface in the field and to foliage of weeds that have emerged above the soil surface, whereby (i) said emerged weeds are killed or controlled and (ii) emergence of weeds that would otherwise emerge during a period of about 10 days immediately following T0 is inhibited. 20. A method of Claim 19 wherein the spray composition is applied to a field in which no crop is planted either shortly before or shortly after application. 21. A method of Claim 19 wherein a crop is planted in the field within a period of time from shortly before T0 until about 30 days after T0. 22. A method of Claim 21 wherein said crop is corn (maize). 23. A method of Claim 19 wherein the spray composition is applied to foliage of crop and weed plants and to the soil surface, and wherein said crop has tolerance of herbicidal activity of the foliar-active herbicide. 24. A method of Claim 23 wherein said crop has been bred by methods involving genetic transformation. 25. A method of Claim 24 wherein said crop is corn (maize).