PL170464B1 - An acaricide, especially a varkiller - Google Patents

Abstract

An acaricide, especially a varroacidal agent, containing a solid or liquid carrier and/or known auxiliary additives, characterized in that it contains as biologically active substance a mixture of α-cyano-3-phenoxybenzyl 2-(2-chloro-4-trifluoromethylanilino)-3-methylbutanoate with 2-bromo-1-(2,4-dichlorophenyl vinyl diethyl phosphate), in a weight ratio of the components from 1:9 to 9:1.

Description

The subject of the invention is an acaricide, especially a varicidal agent.

The compound 2- (2-chloro-4-trifluoromethylanilino) -3-methylbutanoate a-cyano-3-phenoxybenzyl with the common name fluvalinate is known from the US patent No. 4,231,953, which for several years has been an active substance of several preparations intended for protection plant against certain insect pests and mites, and to protect the honeybee from the Varroa jacobsoni mite.

There is known from the Polish patent description No. 79 031 another compound 2-bromo-1 / 2,4-dichlorophenyl / vinyl-diethyl phosphate with the common name bromfenvinphos, which in the form of utility preparations is used to protect plants, mainly potato and rape crops against the Colorado beetle potato and rapeseed sweetener.

It has surprisingly been found that the mixture of fluvalinate with bromfenvinfos enables the use of both components of the mixture in much lower doses while maintaining or enhancing the high pesticidal effectiveness. This behavior of the mixture components is a synergy effect.

The agent according to the invention contains as a biologically active substance a mixture of ac-cyano-3-phenoxybenzyl 2- (2-chloro-4-trifluoromethylaniline) -3-methylbutanoate with 2-bromo-1- (2,4-dichlorophenyl) vinyl diethyl phosphate, in a weight ratio of components from 1: 9 to 9: 1.

The agent according to the invention can be used in various known solid and liquid usable forms, e.g. powders for aqueous suspensions and dusting, granules, plastic moldings with prolonged contact action, pyrotechnic mixtures for fumigation, solutions for pouring, spraying and fogging, water-soluble granules for feeding and other known formulations of pesticides.

The composition according to the invention includes, in addition to active substances, carriers or solvents and, if appropriate, auxiliary substances such as surfactants, adhesives, thickeners, stabilizers, fillers, oxidants, synthetic and vegetable plasticizers, antiadhesive agents, dyes and other known components of the forms usable pesticides.

The agent according to the invention can be used to control the mites of field crops, vegetables, fruit crops and to control sanitary insects and animal ectoparasites. The active substances of the agent according to the invention belong to different chemical groups, namely fluvalinate is a synthetic pyrethroid and bromfenvinphos is an enolophosphate. The mechanisms of the toxic action of synthetic pyrethroids and enolophosphates in arthropods vary, making it difficult to develop resistance in pests.

The agent according to the invention is particularly advantageous for the protection of the honey bee against the Yarroa jacobsoni mite due to its very high varroicidal effectiveness, safety for bees, low level of possible environmental pollution (honey and wax, less than 10 ppb) and hindering the development of mite resistance to the action of substances. active, which is particularly important for a dozen or so generations of mites a year.

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The synergistic effect and the high acaricidal effectiveness of the agent according to the invention, compared to the effectiveness of the individual active substances in the Varroa jacobsoni test, is shown in the following example:

Example. In three bee colonies infected with Varroa jacobsoni mite, marked with letters A, B and C and containing 5 honeycombs in Warsaw hives widened, practically devoid of brood (with an area of redness below 0.5 dcm J, the degree of infestation with Varroa jacobsoni mite was determined) by taking about 400 bees each, treating with ether, counting the number of mites and bees.

The quotient of the number of mites and the number of bees as a numerical indicator of the degree of infestation of bee colonies, calculated in%, amounted to 26.3, 23.7 and 24.4%, respectively.

For bee spraying, 3 doses of application liquids (No. 1, 2 and 3) were prepared, 50 cm ^{3 each,} with the following concentrations:

No. 1 - 0.002 wt.% fluvalinate / 1 mg / L, prepared by mixing 1 cm3 of 0.1% solution fluvalinate methyl ether of dipropylene glycol with 49 cm ³ of water 2 - 0.002 wt%. bromfenwinfosu / 1 mg / L, prepared by mixing 1 cm3 of 0.1% solution of bromfenwinfosu methyl ether of dipropylene glycol with 49 cm ³ of water 3 - 0.001% by weight. fluvalinate AX 5 mg / and 0.001 wt. bromfenwinfosu / 0.5 mg / L, prepared by mixing 0.5 cm ^{3 of} 0.1% solutions of fluvalinate and bromfenwinfosu methyl ether of dipropylene glycol with 49 cm ³ of water.

The bees of the A, B and C families sitting on the honeycombs were sprayed with 50 cm3 of application liquids No. 1, 2 and 3, respectively, containing fluvalinate, bromfenvinfos and the mixture of fluvalinate with bromfenvinfos in the above-mentioned concentrations. After 3 days, the degree of mite infestation in families A, B and C was determined again, which was 9.4%, 0.64% and 0.1%, respectively. The pesticidal activity was:

known agent (fluvalinate) 64.2% known agent (bromfenvinphos) 97.3% of the known agent 99.6%.

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Publishing Department of the Polish Patent Office. Circulation of 90 copies. Price PLN 2.00

Claims (1)

Patent claim An acaricide, in particular a varicidal agent containing a solid or liquid carrier and / or known auxiliaries, characterized in that the biologically active substance is a mixture of a-cyano-3-phenoxybenzyl 2- / 2-chloro-4-trifluoromethylaniline / -3-methylbutanoate with 2-bromo-1- (2,4-dichlorophenyl vinyl-diethyl phosphate) in a weight ratio of components from 1: 9 to 9: 1.