FI64492B - FOERFARANDE FOER UTBREDNING AV IPS-TYPOGRAPHUS-FEROMON BESTAOENDE AV (S) -CIS-VERBENOL OCH METHYLBUTENOL - Google Patents

Description

M (11) ANNOUNCEMENT, AAQ 9 jflgSA l J u 'utlAggningsskrift o44? Z ^ Pate.vt ccddclat (51) K * jk. ^ Irt.CL3 A 01 M 1/02, A 01 N 25/26 SUO MI — EN N LAN D pi) p «^ w« i «w — ι>« «« »βΝ« ι 7922jk (22) HaktmlspUv · —Ara6lcnlfipda (20.07.79 (FI) (23) Start date —Glklghetidag 20.07.79 (41) Tullut iulklMksI —BllYlt offer * »* 23 * 01.00

Patent and Registration Holders / «) Nihtinä? ™ i» HEARING DATE- _ GQ

Patent · och registerstyreleen AnsÖksn utUfd och utUkrKtGft publkerad 31- 0o.o3 (32) (33) (31) Pyyhitty «Tuoikeu * - Bejtrd prlorttet 22.07.78

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) P 28322U8.7 (71) Celamerck GmbH & Co. KG KG, D-6507 Ingelheim am Rhein,

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (72) Hans Herbert Kauth, Ingelheim, Rolf Ludwig Darskus, Gau-Algesheim,

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (7M Leitzinger Oy (5 ^) Method for the application of Ips-typographus pheromone consisting of (s) -cis-verbenol and methylbutenol - Förfarande för ut-bredning av Ips-typographus-pheromon bestä -cis-verbenol and methylbutenol

The invention relates to a process for applying an Ips-typographus pheromone consisting of (S) -cis-verbenol and methylbutenol, which process uses a pheromone preparation enclosed in a plastic film.

(S) -cis-verbenol of formula ΕξΓ

OH

and methylbutenol (2-methyl-3-buten-2-ol) is known to act together as an attractant (pheromone) for arctic beetles (printer, Ips typographus).

In order for the active ingredient mixture to be used as a pheromone, it must be formulated so that it is uniformly released from the formulation over a period of at least 4 weeks. In addition, the number and amounts of both components 64492 2 must then be kept as constant as possible in the range in which a good attracting effect is achieved. It has been found advantageous to release 0.01 to 0.1 mg of (S) -cis-verbenol per hour and 0.5 to 2 mg of methylbutenol per hour.

To date, either perforated polyethylene capsules or glass capillaries coated with a solution of (S) -cis-verbenzene in methylbutenol have been used to release the pheromones. The disadvantage of this method of use is that the pheromone is released in excessive amounts and in an uncontrolled uneven manner. In addition, the workload is high because the pheromone solution has to be added later, otherwise the release time will not be long enough.

It has now surprisingly been found that the pheromone can be released at the desired rate and for a sufficiently long period of time so as to be enclosed in a plastic film of suitable quality and thickness. The method according to the invention is characterized in that a sien body of fungus having a surface of about 24 cm and a thickness of a few millimeters is impregnated with a solution of 100 mg of (S) -cis-verbenol and 1900 mg of methylbutenol, the fungus body is sealed in a polyethylene bag , with a wall thickness of 50 μm and a surface area of 130 cm * 5, and the dispensers obtained are placed in a spruce culture. It was not expected in advance that the pheromone could be successfully released in this way, as there are significant differences between the components in terms of vapor pressure ((S) -cis-verbenol: kp2g torr 120 ° C; methylbutenol: kpygg torr 99 ° C) and also in terms of molecular structure.

Suitable plastic foils for the shell can be made of polyvinyl chloride, polyamide, polyvinylidene chloride and above all polyethylene and have a thickness of about 20 to about 100. Conventional combinations, for example foils based on cellulose / polyvinylidene chloride or polyvinylidene chloride / polyvinyl chloride, are also useful. The pheromone is conveniently present in an absorbent carrier, for example a sponge fabric.

The application unit according to the invention ("dispenser or dispenser 3 64492 device") can be manufactured by welding a 6x4 cm ^ large, several mm thick sponge piece to a piece of large polyethylene hose (wall thickness about 50 μm, diameter about 5.5 cm) about 9 cm long. , saturated with a pheromone solution. One weld seam is at the end of the hose and the other is about 1.5 cm from the other end of the hose; this provides a connector with which the dispenser can be attached, for example to a catch tree. As a peromone, a solution of 100 mg of (S) -cis-verbenol in 1900 mg of methylbutenol is used per dispenser. The biological effect lasts for at least 8 weeks, and the release rate of (S) -cis-verbenol is about 0.025 to 0.04 mg / hour and methylbutenol is about 1.0 to 2.2 mg / hour at a constant temperature of 25 ° C.

Instead of the amounts used herein, 1:19, these components may be used in other ratios between 1:10 and 1:30.

The components of the active ingredient combination can also be welded separately in the same way. The release rate and release ratio can be varied as desired using different foil grades or foils of different thicknesses.

For storage, the dispenser is conveniently sealed in an aluminum bag to prevent excessive pheromone loss.

The substance according to the invention is used in such a way that one or more dispensing devices are attached to the trunk of a spruce in spruce crops at the beginning of the flight time of the beetles. Instead of spruce trunks, stumps about 2 m long and also wood soaked or not planted by rot can also be used as wood. The dispenser can also be attached to fallen formations.

To kill bark beetles, the capture trees are suitably treated with an effective insecticide against the beetles, for example lindane.

A comparative experiment in spruce culture showed that the dispensers according to the invention were able to attract as many bark beetles under the same conditions as the known capsules containing the pheromone solution under the same conditions for a period of eight weeks. By the fifth week, however, the capsules had to be refilled with a pheromone solution.

One delivery device described above (1900 mg methylbutenol / 100 mg S-cis-verbenol) attracted and captured 6729 bark beetles during the observation period.

When 2000 mg of methylbutenol and 50 mg of crystalline S-cis-verbenol (released amount at 25 ° C at a constant temperature of 18 to 35 pg / hour) were separately enclosed in a 50 μm thick polyethylene film, the number of bark beetles captured at the same time was 5220.