CS261809B1 - Attractant for eight-toothed bark beetle - Google Patents

Abstract

The solution relates to a means of attracting Spruce Lichen Ips typographus, containing 1.0 to 10.0% by weight. (S) -cis-verbenol, 80.0 to 98.9 wt. 2-Methyl-3-toutín-2-ol and 0.1 to 10.0 wt. 3-methylene- -l, 6-noinadién-5-ol.

Description

The invention relates to a composition for attracting spruce bark beetle, Ips typographus, containing (S) -cis-verbenol, 2-methyl-3-butin-2-ol and 3-methylene-1,6-nonadiene-5-ol.

Current practice uses pheromones and pheromone preparations in the protection of spruce stands against spruce bark beetle in a substantially double manner, direct and indirect. Indirectly, it is about identifying and determining population density, which helps in decision-making and the need and type of follow-up. It is a mass trap capable of effectively reducing the density, bark beetle population and bringing it under control.

Both methods utilize pheromones released from the evaporators placed in suitable traps as active ingredients. The main components of bark beetle haemocommunication systems are:

Cis-verbenol,

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

2-methyl-6-methyilen-7-octen-4-ol (ipsenol) (Science 154, 3748, 509-510, 1966), trans-verhenol, verbenone, myrtenol, transmyrtenol,

2-phenylethanol, (J. Chem. Ecol. 10, 1029, 1984) and 2-methyl-3-buten-2-ol (Naturwissenschaften 64, 98, 1977).

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

Also known are the primary-attractants of the spruce bark beetle-produced by the spruce host trees, e.g.

monoterpepic hydrocarbons, oxygen monoterpenes, oxygen sesquiterpenes -and sesqulterpenic hydrocarbons.

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

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

RZ

R1-C-C = CH (1j

OH where

R1 and R2 are each independently methyl, 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 an ara-fractate of the spruce bark beetle. Dienol derivatives of the general formula II R-CH — CH2 — C — OH = CH2 (II) are also known (SU No. 730 333) as attractants of the spruce bark beetle.

I I

OH CH2 in which

R is CH 3 -CH 2 -CH = CH- or

CH 3 -CH = C-

I

CH3

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

3-ketobutanol,

3-epoxybytán-2-ol,

2-methyl-2-epoxypropanol, citronelol and heavy fractions of essential spruce oils. The attractiveness of the mixture of 2-methyl-3-buten-3-ol with (S) -cis-ver-benoil can also be increased by the addition of xylene CS 255 251.

It has now been found that the activity of the spruce bark beetle attractant, one component of which is (S) -cis-verbenol, a naturally occurring pheromone and the other a 2-methyl-3-butyne-2-ol naturally occurring synthetic The z-bed can also be significantly synergized by the addition of another non-naturally occurring substance, namely

3-methylene-1,6-nonadiene-5-ol. This potentiation of action is more pronounced in practical conditions, i. j. Directly in the field, in which there is a naturally occurring population of pests than in laboratory olfactometric stents, where artificial conditions, short distances, relatively high concentrations, and mixtures, etc. are present.

The result of the invention can be used as an effective component 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 both representation and release time. using alufan wick evaporators (CS No. 210 299), in which the active substances are incorporated into the pulp carrier and introduced into the environment by a wick. Preferably, the lure can be applied to a barrier-type trap (CS No. 242 257), where the lure insects strike the walls arranged in a cross and are captured through a funnel-shaped part of the trap into a collection vessel and subsequent hymns. The effect is so selective that it does not require further treatment of the trap.

The following examples illustrate the invention but do not limit it.

The following substances were used in the experiments:

I. S-cis-verbenol

II. 2-methyl-3-buten-2-ol

III. 2-methyl-3-toutín-2-ol

IV. 2-methyl-6-methylene-2,7-octadiene-4-ol

V. 3-Methyl-1,6-nonadiene-5-ol Example 1

The pheromone effect of a mixture in which 2 important active substances are synthetically prepared and not known in nature has been verified under laboratory conditions on Walkway olfactometry. The intensity of the reaction was evaluated and expressed by the number of reacting bark beetles. In experiments were used bark beetles from spring swarming from locality Dechtice. In experiments with, and for each variant, 20 subjects were used in 3 replicates. The results are shown in Table 1.

Table 1

The attracting effect of pheromone mixtures on bark beetles in oilphectometry

Mean values from 3 replicates

mark mixtures Percentage I representation II Test compounds in mixtures in Number of responders III IV 1 5.0 95 13.7 2 4.5 95 0.5 14.0 3 4.5 95 0.5 15.6 4 6.0 89 5.0 14.3 5 5.0 85 10.0 14.5 6 4.5 95 0.5 13.8 7 100 2.0 8 100.0 1.0 9 100.0 3.0

Example 2

Field trials were made in the Smolenice LZ west of the village of Dechtice at an altitude of 300 to 350 m. The growth consisted of 60 to 80 percent of spruces between the ages of 80 and 85, the rest were of the same age pine. The active substances were applied to the curling lures placed on the barrier traps, which hurt about 20 m apart and 25 m from the stand wall. Attempts were made at the so-called. The results of the field trials presented in Tables 2 and 3 indicate that 3-methylene-1,6-nonadiene-5-ol significantly potentiates the attractiveness of the masterbatch (/ s / -C> s-verbena!

+ 2-methyl-3-butin-2-ol] depending on dose. Lower dosages potentiate the effect in the first days after administration, higher doses appear more pronounced only after several weeks.

Table 2

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

mixture Number of deviated individuals / trap Σ 0 May 4 8 May 1 70 110 180 90.0 3 150 132 282 141.0 4 134 140 274 137.0 5 100 109 209 104.5

Ί

Table 3

Experiment results in Dechtice

Experiment founded on 4. 5. 1986

Results established on 8 May 1986

Mixture Number of deviations / trap V 0

1st opposite 2nd opposite

1 165 221 3 221 235 4 275 301 5 633 610

386 193.0 956 228.0 570 1,288.0 1 243 621.5

SUBJECT

Claims (3)

SUBJECT A composition for attracting spruce bark beetle Ips typographus on (S) -cis-verbenol ibase, 2-methyl-3-butin-2-ol and 3-methylene-1,6-nonadiene-5-ol, characterized in that: BACKGROUND OF THE INVENTION comprises 1.0 to 10.0 wt. % (S-cis-verbenol, 80.0 to 98.9 wt. % Of 2-methyl-3-butin-2-ol and 0.1 to 10.0 wt. 3-methylene-l, 6-nonadiene-5-ol.