DD144856A5 - DISPENSERS FOR THE APPLICATION OF PHEROMONES - Google Patents

Description

2i4472 - ^Λ ~

Berlin, 6.11.1979 AP A 01 M / 214 472 (55 -762 / 12)

Dispenser for the application of pheromones Field of application of the invention

The invention relates to a dispenser for the application of pheromones.

The dispenser according to the invention is used in particular as attractant for bark beetles.

Characteristic of the known technical solutions

It is known that the compounds (S) -cis-verbenol, Pormel

and methylbutenol. (2-methyl-3-buten-2-ol) in combination as attractant (pheromone) for bark beetle (book printer, Ips typographus) act,

For use as the active ingredient mixture pheromone must be formulated so that it is released from the formulation uniformly over a period of at least A weeks. In addition, while the amount and the ratio of the two components should be as constant as possible in the range in which the most favorable attraction is achieved o It has proven to be advantageous if 0.01 to 0.1 mg (S) -cis-verbenol per hour and 0.5-2 mg of methylbutenol are delivered.

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In order to deploy pheromones, hitherto either bored polyethylene capsules or glass capillaries were used, which were charged with a solution of (S) -cis-verbenol in methylbutenol. This application has the disadvantage that the pheromone is delivered in too large an amount and uncontrollably uneven. In addition, a lot of work, since the pheromone solution must be refilled, because otherwise the nütige delivery time is not achieved.

Aim of the invention

The aim of the invention is to provide a new application form for the application of pheromones.

Indication of the invention

The invention has for its object to find a dispenser that delivers the applicable pheromones, in particular for Ips typographus, in sufficient quantity over a sufficiently long period of time.

As has now been found, surprisingly, the pheromone can be applied at the desired delivery rate and for a sufficiently long time by enclosing it in plastic film of appropriate type and thickness. It was not foreseen that the pheromone a could be successfully applied in this way, as between the components in terms of the vapor pressure ((S) -cis-verbenol: Kp ₂₀ Torr 120 ⁰ C methylbutenol: Kp _{760 Torr} 99 ^P C) and There are also considerable differences in the molecular structure.

For the envelope suitable plastic films may be made of polyvinyl chloride, polyamides, polyvinylidene chloride and

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especially polyethylene, "and have a thickness of from about 20 to about 100 μm. Conventional composite films, for example based on cellulose / polyvinylidene chloride or polyvinylidene chloride / polyvinyl chloride, are also usable, and the pheromone is expediently applied to an absorbent carrier for example on a sponge cloth.

An application unit according to the invention ("Dispenser") can be prepared by placing in a about 9 cm long piece of a hose made of high-pressure polyethylene (wall thickness about 50 / um, diameter about 5.5 cm) a 6 χ 4 cm large, one millimeter thick piece of sponge cloth soaked with pheromone solution; one welded at the end of the hose, the other at about 1.5 cm from the other end of the hose; This results in a tab for attaching the dispenser, z. B. at the catch tree. The solution of 100 mg of (S) -cis-verbenol in 1900 mg of methylbutenol per dispenser is used as pheromone. The biological effect lasts for at least 8 weeks, the release rate is approx. 0.025-0.04 mg / h for (S) -cis-verbenol and about 1.0 - 2.2 mg / hour for methylbutenol at a constant temperature of 25 ^° C.

Instead of the 1:19 ratio used here, the two components can be used in other ratios between 1:10 and 1:30.

The components of the active ingredient combination can also be sealed separately on the same Yfeise. By using different types of foils or foils of different thickness, the release rate and delivery ratio

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be modified if necessary.

During storage, the dispensers are conveniently sealed in aluminum so as to prevent disturbing loss of pheromone.

The application of the agents according to the invention is carried out in such a way that, one or more dispensers in spruce cultures at the beginning of her flying time of the beetle are attached to a spruce trunk. Instead of spruce trunks, it is also possible to use logs that are about 2 m long, including red rotten or wild-barked wood, as a catching tree. Also designed as traps devices can serve as a carrier for the dispenser.

The catcher trees are appropriately treated to kill the bark beetle with an insecticide effective against the beetles, for example with lindane.

From Guide e p; s at play. , ,

The invention will be explained in more detail below by way of example.

In a comparative experiment in spruce cultures showed that with the dispensers according to the invention over a period of 8 weeks under the same conditions as many bark beetles were attracted as with the previously known capsules with pherornone solution. However, the capsules had to be refilled with pheromone solution by the fifth week.

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In an experiment with one of the above-described dispensers (1900 mg methylbutenol / 100 mg S-cis-verbenol) 6 729 bark beetles were attracted and caught during the observation period.

In separate Einsiegelung of 2000 mg methylbutenol and 50 mg of crystalline S-cis-verbenol in 50 to thick polythene film (discharge at a constant temperature of 25 C: 35 / Ug / ^S tunde) was in the same period, the number of captured bark beetles 5220th

Claims (9)

1. Dispenser for the application of pheromones, characterized in that the pheromone is enclosed in a plastic film of about 20 to 100, to wall thickness. 2 dispenser according to item 1, characterized in that the pheromone is applied to a porous support, preferably a sponge cloth · 3 * Dispenser according to item 1 or 2, characterized in that the film consists of polyethylene, polyvinyl chloride, polyvinylidene chloride, polyamide or cellulose _o 4 "Dispenser according to item% 2 or 3", characterized in that the pheromone is a solution of (S) -cis-verbenol in methylbutenol, preferably in a ratio of 1:10 to 1:30 " • Affix 5 spruce seeds or parts of polders and kill the attracted beetles by chemical or physical means 5. Dispenser according to item 1, 2 or 3 », characterized in that the pheromone components are each welded by itself,. 6 · Use of dispensers according to items 1 to 5 »characterized by the fact that they are used to combat bark beetles« i 44 72 -7- 6.1 T. 1.979 AP A 01 M / 214. (55 762/12) -6- 6.11.1979. AP A OV M / 214 (55 762/12) invention claim 7. A method for controlling bark beetles, characterized in that one dispenser according to points 1 to 8, method according to point 7, characterized in that the i'ang trees with a bark beetle v / active chemical ) pesticides are banned. 9. The method according to item 8, 'characterized in that serves as a pesticide lindane.