CS261810B1 - Attractant for eight-toothed bark beetle - Google Patents

Abstract

The present invention relates to a means for attracting spp. (S) -cis-verenol, 80.0 to 98.9 wt. 2-methyl-3-butin-2-ol and 0.1 to 10.0 wt. propargyl and alcohol.

Description

The invention relates to a composition for attracting spruce bark beetle, Ips typographus, comprising (S) -cis-verbenol, 2-methyl-3-butin-2-ol and propargyl alcohol.

Current practice uses pheromones and pheromone preparations to protect spruce stands against spruce bark beetle in essentially two ways, direct and indirect.

Indirectly, it is the determination and determination of population density, which helps to decide on the need and type of subsequent intervention.

In direct terms, this is a mass trap capable of effectively reducing the density of the bark beetle population and bringing it under control.

Both applications utilize pheromones released from the evaporators placed in suitable traps as active ingredients.

The major components of the chemocommunication systems of bark beetles are: cis-verbenol,

2-methyl-6-methylene-12,7-octadien-4-ol (ipsdienol),

2-methyl-6-methylene-7-octen-4-ol (ipsenol) (Science 154: 3,748, 509-510, 1966), trans-verbenol, verbenone, myrtenol, transmyrtenol,

2-phenylethanol, (J. Chem. Ecol. 10, 1029, 1984) and 2-methyl-3-buten-2-ol (Naturwissenschaften 84, 98, 1977).

Based on the knowledge of the mutual synergization of the individual components of the natural pheromone communication system of the Norway spruce bark beetle, there is a known attractant composition comprising cis-verbenol, 2-methyl-3-buten-2-ol and possibly ipsdienol (CS No. 196 414).

Also known are the primary attractants of spruce bark beetle produced by the spruce host trees, for example:

monoterpenic hydrocarbons, oxygen monoterpenes, oxygen sequesterpenes, and sesquiterpenic hydrocarbons.

The use of synthetic attractants, which are not components of the natural communication system of this pest and are not known as primary attractants produced by host plants, and which can be used alone or in mixtures with pheromones or primary attractants, represents a qualitatively new approach to attract bark beetle .

Subject of CS no. 244 985 and CS (PV 5988-85) is a composition for attracting spruce bark beetle consisting of (S) -cis-verbenol, a primary attractant, an alkyne of the formula:

R 2

FROM

R1-C-C = CH \

OH where

R1 and R2 are independently methyl or ethyl and / or xylene.

Subject of SU no. 683,046 is the use of 3-ketobutanol, 3-epoxybutan-2-ol and 2-methyl-2-epoxypropanol as attractants of spruce ilycoctan. Dienol derivatives of general formula (SU No. 730 333) are also known as attractants of spruce bark beetle:

R-CH-CH2-C-CH2-OH

I I

OH CH2 in which

R is CH3-CH2-CH-CH- or

CH 3 -CH = C-

I

CH3

Subject of SU no. 692 122 is a spruce bark beetle attractant containing ipsenol, ipsdienol and trans-venbenol, which, in order to increase its efficacy, also contains:

3-ketohutanol,

3-epoxy-butane-2-ol,

2-methyl-2-epoxypropanol, citronelol and heavy fractions of spruce essential oils. The attracting effect of a mixture of 2-methyl-3-buten-2-ol with (S) -cis-verbenol can also be enhanced by adding xylene CS no. 255 251.

It has now been found that the efficacy of the spruce bark beetle attracting agent, one component of which is (S) -cis-verbenol, naturally occurring on pheromone and the other 2-methyl-3-butyne-2-ol synthetic non-naturally occurring component, may also be significantly synergized by the addition of a further synthetic non-naturally occurring substance, namely propargyilal alcohol within the meaning of the invention.

SUMMARY OF THE INVENTION The composition for attracting spruce bark beetle comprises:

1.0 to 10.0% w / w; % (S) -cis-verbenol, 80.0 to 98.9 wt. % Of 2-methyl-3-ibutin-2-ol and 0.1-10.0 wt. propargyl alcohol.

Potency of action is more pronounced in practical conditions, i. j. directly in the terrain in which the natural population is harmful than in ilaboratory olfactometers? fi 1 8 1 About determinations where artificial conditions are present, short distances, relatively high concentration of the mixture and the like.

The composition of the invention can be used as an active ingredient of a spruce bark beetle monitoring and trapping device. Advantageously, it is possible to administer the active ingredients so as to control their release into the environment in terms of their representation and the time of irrigation, which can be achieved e.g. using alufan wick evaporators (CS AO No. 210 299), in which the active substances are incorporated into the pulp carrier and introduced into the environment by means of a wick. This attractant can advantageously be applied to a barrier-type trap (CS number 242 257), where the attracted insects strike against the walls arranged in a "cross" and are trapped through a funnel-shaped part of the trap into a collecting vessel and subsequent hymns. The effect is so selective that it does not require further treatment of the trap.

The following examples illustrate but do not limit the scope of the invention.

β

The following substances were used in the experiments:

I. S-cis-verbenol

II. 2-methyl-3-buten-2-oil

III. 2-methyl-3-butyn-2-ol

IV. 2-methyl-6-methylene-2,7-oktadié.n-4-ol

V. Propargyl alcohol

Example 1

The pheromone effect of the novel compositions in which the 2 important active substances are synthetically prepared and are not known in nature, has been verified under laboratory conditions on a Walkway olfactometer. The intensity of the shoe response was evaluated and expressed by the number of reacting bark beetles. Spring swarms from Dechtice were used in the experiments. In the experiments, 20 subjects were used for each variant in 3 replicates.

The results are shown in Table 1.

Table 1

Lure effect of pheromone mixtures on lycozruth in olfactometer

Mean values from 3 replicates

Labeling Percentage of test substances in mixtures Number of reagents

I II III

1 5.0 95 2 4.5 95 3 4.5 95 4 4.5 95 5 5.0 85 6 100

IV IN júcich individuals 13.7 0.5 14.0 0.5 13.8 0.5 14.1 10.0 15.0 2.0 100.0 1.0 100.0 5.0

Example 2

Field trials were carried out in the Smolenice IZ west of the village of Dechtice at an altitude of 300 to 350 m. The growth consisted of 60 to 80 percent of spruces at the age of 80 to 85 years, the rest of the sticks of the same old pine. The active ingredients were applied to wicked lures placed on barrier apexes which were approximately 20 m apart and 25 m apart from the stand wall. Attempts were made at the so-called. spring swarming from 24 April to 15 June 1986.

The results of the field trials presented in Tables 2 and 3 indicate that propargyl alcohol significantly potentiates the dose-dependency of the masterbatch ((S) -cis-verbenol 2-methyl-3-butin-2-ol). Lower doses potentiate the effect in the first days after administration; higher doses do not show up until several weeks later.

Table 2

Results of experiments in locality Dechtice Experiment founded 24. 4. 1986

Mixture Number of captured bark beetles / catcher

1. repetition 2. repetition

First 7 (00 510 1 210 605.0 4th 768 656 1 424 712.0 5th 680 573 1 253 '626.5

261010

Table 3

Experiments in Dechtice Experiment founded on 4. 5. 1986

Mixture Number of captured bark beetles / catcher

1. repetition 2. repetition

First 118 33 4th 126 02 5th 115 50

151 75.5 188 94.0 '165 02,5

SUBJECT

Claims (1)

A composition for attracting spruce bark beetle Ips typographus based on [S] -cis-verbenol, 2-methyl-3-butin-2-ol and propargyl alcohol, characterized in that it comprises 1.0 to 10.0 wt.% (S-cis-verbenol We claim: 80.0 to 98.9% by weight of 2-methyl-3-ibutin-2-ol a 0.1 to 10.0% by weight of propargyl alcohol.