FR2590446A1 - Pheromone mixt. for bark beetles control - Google Patents

Abstract

Compsn. for attraction and control of bark beetles contains, as active ingredients, 2-methyl-3-buten-2-ol (I); ispdienol (II; 2-methyl-6-methylene-2,7-octadien-4-ol); and/or cis-verbenol (IV; cis-2,6,6-trimethyl-bicyclo(3,3,1)hept-2-en-4-ol) and/or frontalin (III; 1,5-dimethyl-6,8-dioxabicyclo(3,2,2)octane). More specifically compsns. contain (I), (III) plus (II) (racemate or (-)isomer), opt. together with (IV) (racemate or (S) isomer).

Description

Aaent to attract and fight bostrvches and its use.

The invention relates to an agent for combating bark beetles, in particular the bark beetles of the species.
Orthotomicus erosus.

 He is known [. Giesen et al .; Z. angew. Entomol, 98 (1984) 95], to use, to attract the beetles of the species Orthotomicus erosus, a binary mixture of methylbutenol and ipsdienol.

It is also known that methylbutenol alone [GK Karnavar; Journal of the Royal Swaziland
Society of Science and Technology, 5 (1984) 2], attracts beetles of the species Orthotomicus erosus.

 It is also known (DE-OS 28 OO 479) that ternary mixtures consisting of methylbutenol, cisverbénol and ipsdienol attract beetles of the species Ips typographus.

 It has now been found that, surprisingly, an addition of frontaline and / or cis-verbenol to the already known binary mixture of methylbutenol and ipsdienol has a remarkable action of attraction on the beetles, in particular of 'Orthotomicus erosus.

One of the immediate objects of the invention therefore consists of agents for attracting beetles, containing
a) methylbutenol, ipsdienol and frontaline,
or
b) methylbutenol, ipsdienol, frontaline and cis-verbenol, as well as the use of an attraction agent already known for combating the beetles of the species Ips erosus, containing
c) methylbutenol, ipsdienol and cisverbénol.

 The various constituents of mixtures a), b) and c) are known and described in detail in the chemical literature.

Methylbutenol is 2-methyl-3-butene-2-ol (I), 1 ipsdienol is 2-methyl-6-methylene-2,7-octadiene-4-ol (II), frontaline is 1 , 5-dimethyl-6,8-dioxabicyclo [3.2.1] octane (III) and cis-verbenol is (cis) -2,6,6-trimethyl-bicyclo (3.1.1] hept-2-ene- 4-ol (IV) (diagram 1)

 Compounds (II) to (IV) can be in various enantiomeric forms. It is also possible to use the racemate for all the substances mentioned.

 The mixtures a), b) and c) according to the invention can be used either alone or in combination with suitable auxiliary substances and supports, according to methods known per se. The proportion of the various constituents (I) to (IV) can vary in this case within wide limits.

 We prefer the methods of application and mixtures which release the pheromone bouquet over an extended period.

A clear excess of methylbutenol is preferred, which can serve at the same time as a solvent for the other constituents of agents a), b) and c).

 The application of the attractants in accordance with the invention is carried out by methods known per se. Plastic bags are preferred in which the attractive substances are isolated by soldering, or the mixture already ready.

The choice and the mixing ratio of the mixtures mentioned in a) to c) is determined by various factors, among others by:
- the capture process (setting trap, such as the Norwegian comb tube (Kammrohr), the Canadian multi-funnel system; flight barriers such as the Rôchling flat funnel, the slit trap
Theyson; an attraction by capture trees, etc.)
- the purpose of the capture (capture of 0. erosus alone or at the same time as other species of beetles; mass capture; monitoring etc.)
- the duration of action sought
- the nature of the distributor (capillary distributor; small tubes with perforated cover; polyethylene bag; direct spraying on wood, etc.).

The use of thinners and solvents allows easier handling and dosing of combinations of attractive substances. As solvents or diluents, there may be mentioned for example:
- saturated or unsaturated hydrocarbons having a boiling point up to 150 ° C, in particular the various pentanes, hexanes as well as cyclohexane, methylcyclohexane, cyclohexene etc.

- alcohols such as methanol, ethanol as well as propanols, butanols, pentanols and hexomer isomers
- cyclic alcohols
- unsaturated alcohols
- polyethylene glycols
- Vaselines
- colloidal silicic acid.

 The use takes place in a manner known per se, for example in accordance with DE-OS 28 32 248.

In addition, the combination of attractive substances can be incorporated into pasta and used packed in plastic bags in accordance with the
DE-OS- 29 45 655. Plastic bags, preferably of polyethylene, generally have a wall thickness of 20 to 200 microns and an area of about 80 to 320 cm2. The ratio of the constituents in the combination of attractive substances can vary within wide limits. A high proportion of solvent is generally advantageous.

 The constituents of the combination of attractive substances according to the invention can also be distributed among several distributors. This is advantageous in the sense that, for example when using dispensers with a plastic bag, the release rates of the various pheromones can be harmonized with one another by the choice of different film thicknesses.

 The invention therefore also includes the combination of various distributors between which the combination of attractive substances of the invention is distributed.

As examples of mixtures of the various constituents, the following proportions may be cited, in percentages
Ternary mixture a)
Ipsdienol 0.1-10%
0.1-20% frontal
Methylbutenol to make 100
or
Quaternary mixture b)
Cis-verbenol 0.1-10%
Ipsdienol 0.1-10%
0.1-10 frontal
Methylbutenol to make 100
or
Ternary mixture c)
Cis-verbenol 0.1-10%
Ipsdienol 0.1-10%
Methylbutenol to make 100
The following examples are given by way of illustration of the invention.

EXAMPLE 1
Capture of 0. erosus in flat funnel pieces.

In a 4 x 5 cm polyethylene bag with a wall thickness of 0.05 mm, it is sealed
la) 2500 mg of methylbutenol, 30 mg of ipsdienol and 100 mg of (S) -cis-verbenol,
lb) 2500 mg methylbutenol, 30 mg ipsdienol and 100 mg racemic frontaline.

 The baits thus prepared are suspended in flat funnel traps. To avoid positional effects, the baits are rotated after each control.

 The tests were carried out from 20.07.1985 to 25.07.1985 in a pine stand near Bordeaux.

No. of test pass I II III
Attractive substance la) 131 197 29
Attractive substance lb) 137 286 32
(number of Orthotomicus
erosus captured)

Claims (5)

 1. Agent for attracting and combing beetles, characterized in that it contains an effective amount of methylbutenol and ipsdienol and / or cis-verbenol and / or frontaline as active substance.  2. Agent according to claim 1, consisting of methylbutenol and frontaline and ipsdienol or (-) - ipsdienol.  3. Agent according to claim 1, consisting of methylbutenol and frontaline and ipsdienol or (-) - ipsdienol and cis-verbenol or (S) -cis-verbenol.  4. Use of an agent according to one of claims 1 to 3 for combating bark beetles.  5. Use of an agent according to claim 1, characterized by an effective content of methylbutenol and ipsdienol or (-) - ipsdienol and cis-verbenol or (S) -cis-verbenol as active substance for combating bark beetles Orthotomicus erosus species.