AGENT ATTRACTING BARK BEETLES

Abstract: The agent for attracting bark beetles is designated especially to monitor occurrence and mass capturing of Pityogenes chalcographus or, as the case may be, simultaneously with Ips typographus, suitable especially for traps and pheromone dispensers. As the active component it contains a mixture of decadienoic acid derivatives of general formula (I), wherein R means methyl or methoxy group and at least one furyl derivative of general formula (II) where R<1> means H or -COCH3 group in the medium of a suitable solvent. The mixture of the above derivatives shows a synergetic effect.

Description: Agent attracting bark beetles Technical Field The invention relates to an agent attracting bark beetles suitable especially for attracting Pityogenes chalcographus and Ips typographic. Background art It is known that the main components of the aggregation pheromone of P. chalcographus are chalcogran and Me-2,4-decadienoate (J. Chem. Ecol. 1989, 15(2): 685-95, J. Chem. Ecol. 1990, 16(3): 861-76), the combination of which has a potentiating character. The final degree of the attracting effect of the preparations on their basis is considerably dependent on the presence and/or ratio of the particular stereoisomers putting high demands on the synthesis. It is also known that this effect can be potentiated to a limited extent by additional minority components such as α- pinene or β-pinene. The active components, usually utilised in a suitable inert organic solvent (higher alcohols), are applied into special dispensers as the final forms. These preparations are multi-component mixtures (DE 3430211 Ai). There is a European patent (Appl. No. 87850032.1, Publ. No. 0233164 A.), protecting the use of methyl deca-2,3-dienoate in combination with chalcogran in monitoring of occurrence and capturing of P. chalcographus, whereby additional substances enhancing the effect can be used in the mixture (Naturwissenschaften 75, 1988, 153-155). There is also the patent application PV 1503-93 protecting the use of 2-methoxypropyl deca-2,4- dienoate in combination with chalcogran in capturing of P. chalcographus and in mixture with other substances also in capturing of/, typographus. Disclosure of the invention Now it has been found that a suitable attracting agent for bark beetles is a preparation containing as an active component a mixture of decadienoic acid derivatives of the general formula I: CH 3 -(CH 2 ) 4 -CH=CH-COOR (I) where R is methyl or methoxy group, and at least one furyl derivative of the general formula II where R 1 is H or -COCH 3 group in the medium of a suitable solvent. The mixture of the above derivatives has a synergetic effect. Preferred solvents include preferably liquid aliphatic hydrocarbons or their alcohols, ethers or esters. More preferred solvents include especially methylbutenoi, methylbutynol, methoxypropanol and hexane. Together with the active component of the agent according to the present invention, also other active substances can be used in application such as pinene, camphene, limonene, ipsenol, ipsdienol or essential oils. The agent according to the invention can be used for monitoring and, with an advantage, for suppressing undesirable population density of P. chalcographus but also /. typographus by the method of mass capturing or by the method of disorientation, without mutual interference, whereby the species composition of the catch corresponds to the composition in the particular natural population. The agent according to the present invention is preferably applied in the wick type dispensers, PE sacks and other types providing for gradual and sufficiently long- term release of the active substances to the air and ensuring sufficient duration of the attracting effect during swarming of both species of bark beetle or in disorientation by area application. Capturing of these target species is not accompanied by undesirable capturing of other useful or inert species of insects. The dispensers can be applied to routinely produced traps with an advantage for barrier-type, impact-type, especially the Ecotrap type, but also other analogous types. The following examples are meant to illustrate, but not limit the scope of the present invention Example 1 Field expeπment at the site of Mala Lehota The dispensers with tested agents were applied to impact-type traps able to capture also the smaller Pityogenes chalcographus The traps were placed in the field m accordance with the applicable standard, preferably to the so called growth wall The checks of catch were done in 24-hours intervals The position of attractants was vaπed to eliminate the position effect. The results are summarised in Table 1 98/26663 Table 1: Count of specimens of P. chalcographus (PC) and I. typographus (IT) during 8-days' exposition of dispensers, the dispenser position being changed daily. (Site of Mala Lehota, 24 - 31 July 1994) Explanation of abbreviations: SCV - S-( -s)-verbenol MPOL - methoxypropanol FUROL - l-(α-tetrahydrofuryl)pentane-3-ol ACET - 1 -(α-tetrahydrofuryl)-3 -acetoxy-pentane CHAL - racemic mixture of chalcogran MDD - methyl deca-2,4-dienoate MPDD - 2-methoxypropyl deca-2,4-dienoate MBIOL - methylbutynol MBEOL - methylbutenol t) - (-)α-pinene 0.005 ml 2) - [R](+)limonene 0.005 ml 3) (-)α-pinene 0.005 ml + pine essential oil 0.005 ml 4) pine essential oil 0.005 ml 5) - [R](+)limonene + pine essential oil 0.005 ml Example 2 Field experiment at the site of Brod The procedure was similar to that of Example 1. The period of exposition was 16 days, the attractants' positions were changed on the 8 th day. The results are summarised in Table 2 and Table 3. Table 2 Capturing of specimens of P. chalcographus (PC) and I. typhographus (IT) during 16 days' exposition of dispensers (Site Brod, 8 - 24 July 1994) Table 2 - continued 5. scv 0.08 g 2500 5300 10. SCV 0.08 g 2500 4760 FUROL 0.02 ml ACET 0.02 ml MPDD 0.02 ml MPDD 0.02 ml MBIOL 1.87 ml MBIOL 1.87 ml MPOL 0.01 ml MPOL 0.01 ml Table 3: Additional experiments at site Brod (24 July - 8 August 1994) zlozka IT PC II.FΠROL 0.01 ml 0 4 ACET 0.01 ml MBEOL 1.98 ml 12.CHAL 0.02 ml 0 4790 MDD 0.02 ml MBEOL 1.96 ml 13. FUROL 0.01 ml 0 5220 ACET 0.01 ml MPDD 0.02 ml MBEOL 1.96 ml 14. UROL 0.01 ml 0 5620 ACET 0.01 ml MDD 0.02 ml MBEOL 1.96 ml 15. SCV 0.08 g 2560 5810 FUROL 0.01 ml ACET 0.01 ml MPDD 0.02 ml MBIOL 1.87 ml MPOL 0.01 ml Explanation of abbreviations in tables 2 and 3: SCV - S-(cw)-verbenol MPOL - methoxypropanol FUROL - l-(α-tetrahydrofuryl)pentane-3-ol ACET - 1 -(α-tetrahydrofuryl)-3-acetoxy-pentane CHAL - racemic mixture of chalcogran MDD - methyl deca-2,4-dienoate MPDD - 2-methoxypropyl deca-2,4-dienoate MBIOL - methylbutynol MBEOL - methylbutenol Industrial A] pplicabilitv The invention is designed for the field of plant protection, especially for protection of forest growths against pests from the group of bark- and wood-damaging (ligniperdous) insects, especially Pityogenes chalcographus and Ips typographus.

Claims: Claims An agent attracting bark beetles designated especially for monitoring of occurrence and mass capturing of Pityogenes chalcographus, as the case may be, simultaneously with Ips typographus suitable especially for application in traps and pheromone dispensers characterised by having as the effective compoent a mixture of decadienoic acid derivative of the general formula I: CH 3 -(CH 2 ) 4 -CH=CH-COOR (I) where R means methyl or methoxy group, and at least one furyl derivative of the general formula II where R 1 means H or -COCH 3 group in the medium of a suitable solvent. 2. Agent according to claim 1 characterised by individual components of the mixture being represented in the active component of the agent in the ratio of 1: 1 to 1: 100, preferably in the mutual ratio of 1:2, whereby in the case, where the mixture is formed by two furyl derivatives, their mutual ratio is 1 : 1. 3. Agent according to claim 1 characterised by the fact that the solvent is selected preferably from liquid aliphatic hydrocarbons or their alcohols, ehters and esters. 4. Agent according to claim 3 characterised by the fact that the solvent is selected from a group comprising hexane, methylbutenol, methylbutynol and methoxypropanol. 3 Agent according to any of the preceding claims characteπsed by the fact that it contains in its active component at least one substance of the group compπsing 2-ethyl-l,6-dιoxaspιro[4 4]nonane, S-(cw)-verbenol and methyl deca-2,4- dienoate Agent according to any of the preceding claims characteπsed by the fact that in the active component it further contains terpenes and/or their mixtures and, as the case may be, essential oils

Inventors: VARKONDA STEFAN, VARKONDA, STEFAN
Applicants: VARKONDA STEFAN, VARKONDA, STEFAN
Application year: 1997
Main classification: A01N43
IPC codes: A01N43