DD262789A1 - AGENT FOR THE INTAKE AND CONTROL OF OCNEROSTOMA PINIARELLUM - Google Patents

Abstract

The invention relates to a means for attracting and combatting Ocnerostoma piniarellum based on 1-butoxy-2,3-epoxy-propane of the formula. The agent according to the invention can be used in connection with auxiliaries and carriers in the field of crop protection. By using the agent according to the invention as insect attractant in traps, rational monitoring and prognosis methods can be realized. The use of the agent in pest control for confusion technology or in conjunction with a conventional pesticide makes it possible to carry out rational and biosynthetic shipping methods. formula

Description

Field of application of the invention

The invention relates to an insect attractant based on 1-butoxy-2,3-epoxy-propane for attracting and for controlling Ocnerostoma piniarellum (pine moth).

Characteristic of the known technical solutions

The insect attractants (pheromones) have found increasing interest in recent years, especially in the search for new, environmentally friendly pest control methods

 (DD 0153315, DD 154856, DE 2800479).

Its advantage in the field of plant protection lies in its exceptional selectivity, which is directed in one single species only, at most in a limited number of species, while leaving other species unaffected. It is therefore possible, with the help of pheromones, to specifically combat a certain type of pest without disturbing the ecological balance more than necessary. Pheromones are secreted by numerous insects and have a certain signaling effect on other individuals of the same species. This is especially true for sex pheromones produced by females of an insect species to attract males of the same species for the purpose of copulation. This phenomenon can be exploited in pest control in three ways:

1. by laying out fragrance bodies that attract the males of a pest species over long distances, so that they can be selectively destroyed in place by conventional means (interception);

2. by applying relatively high concentrations of the pheromone, thereby disorienting and preventing the _mJ insect population to be controlled (confusion technique);

3. by deploying traps to determine the abundance of a pest species in a given area and thus the most favorable time for control by conventional methods (monitoring techniques).

The pine moth Ocnerostoma piniarellum is a forest pest whose caterpillars destroy the needles of various species of the genera Pinus, especially Pinus silvestris and cembra, as well as Abies and Juniperus by mincing. Under favorable external conditions, the formation of a damaging population (gradation) can occur at short notice, which can lead to serious damage and ultimately to considerable reductions in yield. It is therefore of particular importance to regularly monitor the stocking density of Ocnerostoma piniarellum in order to detect the development of a harmful population at an early stage and to be able to take appropriate countermeasures.

A reliable method for the safe and simple detection of the pest before the onset of population emergence or for its control was lacking so far, since the sex attractant of Ocnerostoma piniarellum was previously unknown (SHOREY, HH, Mc KELVEY, JJ: Chemical control of insect Behavior, John Wiley and Sons, 1977, 417 p.). However, it is known that sex attractants of Lepidoptera often consist of simple derivatives of mono or dienes medium chain length, especially alcohols, aldehydes and acetates (Tetrahedron, 33 [1977], 1845 et seq.).

Object of the invention

The invention has a means for attracting and controlling the Arvenmotte to the target, which allows a safe, efficient detection of the pest and a biozönoseschonende combat.

Explanation of the essence of the invention

The invention has for its object to provide a means for attracting and fighting the Arvenmoth at your disposal. According to the invention, the object has been achieved by using 1-butoxy-2,3-epoxy-propane as an active ingredient because of its attractant properties on ocnerostoma piniarellum

Surprisingly, it has been found that 1-butoxy-2,3-epoxy-propane CHp- ( CH 2) 3 -O-CH 2 -

selectively and highly specifically attracts the male moths of Ocnerostoma piniarellum.

For the application-oriented formulation of the active ingredient, both liquid and solid preparations are suitable.

In order to achieve a precise release of the attractant, it is dissolved in suitable diluents, such as high-boiling, aromatic, aliphatic or cycloaliphatic compounds, as far as these volatile organic solvents are reaction-inert to the pheromone.

In addition to hydrocarbons, esters, ethers or ketones are particularly suitable. Typical representatives of these classes are z. B.

Xylene, methylnaphthalenes, paraffin oils, cyclohexane, ethyl glycol acetate, isophorone and dibutyl phthalate. These solvents can be used alone or in admixture with other components.

The rate of volatilization can be reduced by dissolving the attractant in a substantially odorless, reaction-inert, viscous liquid.

For this purpose, solutions in vegetable, animal or synthetic oils or fats and other, evaporation-inhibiting solvents with low vapor pressure (such as polyethylene glycol or silicone oil) for the purpose of effect extension ago.

Furthermore, it is possible to bind the active ingredient in or on natural or synthetic solid carriers such as rubber, cork, cellulose, foams, ground coal, wood flour, silicates, pumice, calcined clay or other solid carriers or to use in special capsule formulations or plastic containers so as to achieve a uniform release to the air over a longer period of time. In addition, the active ingredient from suitable containers (capillaries or other vessels) can be made to evaporate through narrow openings, whereby one reaches over particularly long periods of time particularly uniform scent concentrations. The content of active ingredient in these preparations may vary within wide limits. In general, the ratio of active ingredient: additive may be in the range of 10: 1 to 1:10 ⁷ . In capsules or other suitable containers, for example, the active ingredient can be used in its undiluted form and its weight fraction, based on the total formulation, may be very high and be up to 90%. In general, however, very low concentrations of active substance are sufficient in the preparations to exert a laxative effect on Ocnerostoma piniarellum males. Preference is given to a quantitative ratio of active ingredient of 10: 1 to 1: 10,000.

The composition according to the invention can be used in various ways. So you can, for example Apply traps impregnated with 1-butoxy-2,3-epoxy-propane or a formulation thereof. This allows one to determine the exact population density of Ocnerostoma piniarellum and, once it has reached a critical limit, to control it by conventional means.

For this method are most suitable formulations with low-volatility additives that release the drug protahiert, such as rubber, cellulose, waxes, polymers or polyethylene glycol, as well as formulations in capsules or other containers (capillaries), the attractant either through their walls or by tight Make openings. The active ingredient concentration is generally in the range 1:10 to 1:10 ^{7 here} .

It is also possible to combine the active ingredient with a contact or feeding insecticide and in this way directly destroy the attracted males. The active ingredient concentration is in the same order of magnitude as above. Finally, the drug can be applied in comparatively high concentrations to prevent males from disorienting and confusing mating. For this purpose, formulations with higher active substance contents (10: 1 to 1:10 ⁴ ) are generally used.

embodiments example 1

Adhesive traps with inserted glass capillaries of about 1 mm in diameter, each filled with 1 mg of a test substance, were deployed in a forest area infested by Ocnerostoma piniarellum. Various test substances were tested in this way for their attractant activity against Ocnerostoma piniarellum. At the conclusion of the series of experiments, the result was as follows:

Table I

Test substance male / trap

1-butoxy-2,3-epoxy-propane 424

182 other connections 0

Females were not caught.

Thus, it was proved that 1-butoxy-2,3-epoxy-propane behaves like sexual pheromone of Ocnerostoma piniarellum.

Example 2

In a second series of experiments were adhesive traps with inserted glass capillaries filled with 1-butoxy-2,3-epoxy-propane - each 1 mg of active ingredient dissolved in polyethylene glycol - filled, as described above, and from the beginning of the flight time of Ocnerostoma piniarellum continuously observed. The suitability of the identified attractant in traps to determine maximum flight should be investigated.

tables

Catch numbers of Ocnerostoma piniarellum in adhesive traps baited with 1 mg each of 1-butoxy-2,3-epoxy-propane

Date Number of captive males / trap

21/7/86 1 25/7/86 3 29/7/86 9 08/05/86 18 08/08/86 40 12/8/86 66 15/8/86 51 19/8/86 12 25/8/86 4 29/8/86 1 09/02/86

It has been found that the compound of the invention is well suited to determine the maximum of the flight of Ocnerostoma piniarellum.

Claims (3)

Invention claim: 1. means for attracting and controlling Ocnerostoma piniarellum (Arven moth), characterized in that they contain 1-butoxy-2,3-epoxypropane in addition to conventional excipients and carriers. 2. Composition according to item 1, characterized in that the weight ratio of active ingredient additives in the range of 10: 1 to 1:10 ⁷ . 3. Means according to item 1 to 2, characterized in that they contain other insect control agents or other insect-biologically active substances in addition to the active ingredient.