CS277444B6 - Agent for attraction of bark beetles - Google Patents

Abstract

The invention relates to a process, an attractant and devices for attracting engraving beetles, or traps which are particularly suitable for attracting the engraving beetle Ips typographus. The active compound mixture contains (S)-cis-verbenol and 2-methoxypropan-1-ol. The high activity of these mixtures of active compounds was tested and demonstrated under field conditions.

Description

BACKGROUND OF THE INVENTION The present invention relates to a composition for attracting bark beetles, particularly suitable for the bark beetle of Ips typographus. The composition in the mixed active ingredient comprises S-cis-verbenol.

It is known that Ips typographus is characterized by high viability and, under favorable conditions, a high reproductive capacity and thus a possible calamitous degree of occurrence mainly in older or possibly weakened spruce stands. Excessive causes considerable economic and environmental damage.

The current practice uses essentially two ways of protecting spruce stands against spruce bark beetle. The first is sued for labor-intensive and economically disadvantageous use of spruce spruce tree trunks as traps and in chemical destruction by spraying with insecticidal products. In addition to the above-mentioned disadvantages, another disadvantage of this method is the undesirable disturbance of the ecological balance of the forest caused by the insecticides used. The second method used to combat the spruce bark beetle is based on its mass capture by pheromones released from the evaporators, placed in suitable traps. The main components of the communication system of some bark beetles are:

cis-verbenol, 2-methyl-6-methylene-2,7-octadien-4-ol (ipsdienol), 2-methyl-6-methylene-7-octen-4-ol (ipsenol) (Science 154, no. 3748 509-510, 1966], further trans-verbenol, verbenone, myrtenol, trans-myrteno1, 2-phenylethanol (J. Chem. Ecol. £ 1029 (1984) and 2-methyl-3-buten-2-ol (Naturwissenchaften 64, 98, 1977).

Recognizing that the individual components of the natural pheromone bark beetle communication system are synergistic with one another, a known composition for attracting spruce bark beetle containing cis-verbenol, 2-methyl-3-buten-2-ol and optionally ipsdienol (CS 196 414) is based. Also known are the primary attractants of the spruce bark beetle produced by host spruce trees such as e.g. some monoterpenic hydrocarbons, oxygen monoterpenes, sesquiterpenic hydrocarbons and oxygen sesquiterpenes. It is further known to use 3-ketobutanol, 3-epoxy-butan-2-ol and 2-methyl-2-epoxypropanol as attractants of spruce bark beetle (patent SU 683 046). The subject (USSR 692 122) is a spruce bark beetle attractant containing ipsenol, ipsdienol, and transverbenol, which further contains 3-ketobutanol, 3-epoxybutan-2-ol, 2-methyl-2-epoxypropanol, citronelol and heavy fractions essential oils of spruce. The attracting effect of a mixture of 2-methyl-3-buten-2-ol and (S) -cis-verbenol can also be enhanced by the addition of xylene. author's certificate no. 255,251 /.

CS 244 985 relates to a composition for attracting spruce bark beetle consisting of an alkinol of the general formula

R ¹ - C - C ssaCH,

OH wherein R ¹ and R ² are each independently methyl or ethyl, further from S-cis verbenol, the primary attractin of the host tree and optionally xylene.

It has now been found that a high activity in attracting bark beetles, in particular spruce bark beetle (Ips typographus), has a composition according to the invention comprising S-cis verbenol in the active ingredient mixture.

The present invention is characterized in that the composition also contains 2-methoxypropan-1-ol in the mixed active ingredient.

The bark beetle compositions of the present invention are illustrative, but not limiting, of the following examples.

Example 1

The attracting effect of the composition according to the invention was verified directly in terrain operating conditions in the locality Hriňová-Bratkovský most (Volaný area). In the area for spruce stands about .70 years old with the addition of fir and beech at an altitude of 600 to 700 m. The active ingredients were applied to wicked lures placed on barrier traps 20 to 25 m apart and 25 m from the stand wall. To exclude the so-called. position effect (preference), the occurrence of bark beetles in relation to traps positions long-term (May 27 - July 14, 1987) was verified using the commercial preparation of the Czech Republic. production Etokap, tested preparations were subsequently placed on traps with relative. the same occurrence (July 14, 1987), with the exchange of positions being realized. The number of captured individuals (IPS typographus) in traps was counted after 1 month exposure (August 18, 1987). The results are shown in Tab. 1 and expressed in absolute numbers of captured individuals in individual traps (2 replicates).

Table 1. Effectiveness of pheromone preparations in field trials in the VOUANA area, cadastre of the municipality HRIŇOVÁ, locality BRATKOVSKÝ MOST. Number of captured individuals evaluated

18. 8. 1987.

Table no. 1

Labeling Active substance content per lure Diameter.

preparation of S-cis-verbenol 2-methoxypropan-1-ol 2-methyl-3- number of but-2-ol trapped in trap

Mep 0.1 g 1.9 ml 905 Mep 0.1 g 1.9 ml 859 IT Etokap I 0.1 g - 1.9 ml 690 IT Etokap II 0.1 g - 1.9 ml 800

Example 2

The attracting effect of the composition was verified in the locality Dechtice (forest management Smolenice) by the same procedure as in Example 1. Evaporators with the tested mixtures were put on traps on April 25, 1989 (A) and a second experiment in the same locality on April 26, 1989 (B). ). The number of captured individuals was evaluated at the same time at

I j

both experiments on May 17, 1989. In the following tables 2.

and (3) results in absolute numbers of trapped individuals per trap.

Table 2 (Experiment A)

Labeling Content of active substance per kite Number of product S-cis-verbenol 2-methoxypropan-1-ol 2-methyl-3-captive

-butin-2-ol individuals

Mep I. 0.1 g

Mep II. 0.15 g

IT-Etokap 0.1 g

1.9 ml - 1,375

1.85 ml - 819 '

1.9 ml 691

Table 3 (Experiment B)

Labeling Active ingredient content per lure Number of preparations S-cis-verbenol 2-methoxypropan-1-ol 2-methyl-3-butyne-2-ol individuals

Mep III. 0.05 g Mep II. 0.15 g IT-Etokap 0.1 g

1.95 ml - 439

1.85 ml - 409

1.9 ml 294

Example 3

The effect of selected mixtures on bark beetles was determined under laboratory conditions on Walkway olfactometry. The results are shown in the following table. 4th

Table 4

Labeling Proportion of active ingredients Number of reactants in%. bark beetles

S-cis-verbenol 2-methoxypropan-1-ol φ from 3 replicates

1 6.25 93.75 14.33 2 5.00 95.00 16.33 3 3.75 96.25 18,00 4 0.25 99.75 17,00 5 - 100 1 6 Standard IT - Etokap mixture 12.66 7 Control without treatment • 0

Example 4

Mixtures of the composition listed under positions 1-4 in Table 4 were tested in field experiments applied to Chemika wick evaporators in a total volume of 3 ml per evaporator. To eliminate the positioning effect, evaporator positions of CS 277444 B6 metals changed after each evaluation. Their effect in the locality Dechtice, expressed as the number of captured spruce bark beetle individuals, is shown in Table 5. The application was performed on 13 June 1989.

Table 5

Mixture no. 14. 7. evaluation day 28. 7. 16. 8. 1 2 186 304 164 2 3 387 106 132 3 4 008 490 334 4 2 814 179 149 IT-Etokap (Chemistry) 1 243 15 55

PATENT CLAIMS

Claims (1)

A composition for attracting bark beetles, in particular suitable for attracting bark beetle IPS typographus containing S-cis-verbenol in the active ingredient, characterized in that it also contains 2-methoxypropan-1-ol.