Synergistic insecticidal compositions

Details Synergistic insecticidal compositions Synergistic insecticidal compositions

1994-02-22

1996-02-13

Robinson, Allen J.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Ester doai

514531, A01N 4102, A01N 5300

Patent

active

054911680

DESCRIPTION:

BRIEF SUMMARY
This application is a 371 of PCT/U.S. 92/07288, filed 8/27/92.


BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention is directed to mixtures of propargite and synthetic pyrethroids, which exhibit synergistic activity as pesticides.
Thrips palmi is a transplanted insect from Southeast Asia which has caused serious damage to cucumber, watermelon, melon, eggplant and green pepper in recent years. It has no strong natural enemy, and is believed to cause more serious growth damage or fruit damage than any other known insect. Compounds such as sulbrophos, oxamil, carbosulphane, cypermethrin, pemfracalp, BMPC, DMTP, cyfulbenzron, etc. have been used in the past. However, none of them has had a sufficient protective effect.


SUMMARY OF THE INVENTION

The compositions of the present invention contain an active ingredient comprising a mixture of A) propargite, and B) a synthetic pyrethroid. The present invention also comprises a method for controlling undesirable insects which comprises applying an effective amount of a composition according to the present invention to a locus to be protected.


DETAILED DESCRIPTION OF THE INVENTION

The propargite portion of the active ingredient is a well known insecticide sold under the trademark OMITE (Uniroyal Chemical Company) and has the chemical name 2-(4-tert-butylphenoxy) cyclohexyl prop-2-ynyl sulfite. Examples of the synthetic pyrethroid active ingredient are cyfluthrin, fenpropathrin, cyhalothrin, fulvalinate, tralomethrin, etofenprox, fulcytirinate, cypermethrin, permethrin, and fenvalelate.
In the insecticide compositions of the present invention, the propargite component may be present in the amount of from 3 to 1,000 ppm, or more preferably 100-400 ppm. The synthetic pyrethroide type component may be present in the amount of from 1 to 1,000 ppm, or more preferably 10-200 ppm.
Propargite, which is one of the effective components of the insecticide offered by the present invention, shows almost no effect against minami-kiiro-azamiuma (also known as Thrips palmi) by itself. In addition, synthetic pyrethroide type insecticides, which is also one of the effective components of the insecticide compounds offered by the present invention, does not show sufficient effect against minami-kiiro-azamiuma by itself even in the case of cypermethrin which has obtained the Agricultural Chemical Registration in Japan. The compositions offered by the present invention give superior effectiveness which cannot be obtained by each component alone.
As it is described in the application example, common forms of agricultural agents such as aqueous solutions, emulsions, dry-flowable, flowable, or smoke agent which contain the propargite and the synthetic pyrethroide type insecticides may be prepared. Alternaterely, agents which contain the individual active ingredients are prepared and then mixed together later.
The present invention is explained in detail by reference to the following examples.


EXAMPLE 1



______________________________________ Propargite 30 parts Tralomethrin 1 part White Carbon (Silica) 2 parts Diatmaceous Earth 58 parts Alkylbenzene sodium sulfonate 2 parts Lignin sodium sulfonate 7 parts ______________________________________
The above components were uniformly mixed, and dissolved in water to obtain a 31% aqueous solution.


EXAMPLE 2



______________________________________ Propargite 30 parts Tralomethrin 1 part Xylene 44 parts Dimethylformamide 15 parts Alkylbenzene calcium sulfonate 4 parts Polyoxyethylene-alkylphenylether 6 parts ______________________________________
The above components were mixed and melted to obtain a 31% emulsion.


EXAMPLE 3

A mixed aqueous solution of propargite (BPPS) and synthetic pyrethroid type insecticides was diluted to the concentrations shown in Table 1, and sprayed on individually potted 20-30 cm tall greenhouse grown eggplants (kind: Kokuyo) which were severely infested by minami-kiiro-azamiuma by using a portable sprayer until the liquid started to drip from the leaves. Th

REFERENCES:
patent: 3463859 (1969-08-01), Covey et al.
Worthing et al., The Pesticide Manual, 9th Ed. (1991), pp. 208 & 209.
Mitsui Toatsu Chem. Inc., "Insecticide and acaricide compsns.--including e.g. 1,1-bis(chlorophenyl)-2,2,2-trichloro:ethanol", Chemical Patents Index, Documentation Abstracts Journal, Section Ch, Week 9032, 3 Oct. 1990, Derwent Publication Ltd., London, GB; Class C, AN 90-24198/32.
Shiraishi, Shiro, "Insecticidal and Acaricidal Agent Composition", Patent Abstracts of Japan, vol. 14, No. 431 (C-750)(4374) 17 Sep. 1990.
Sumitomo Chemical Co., Ltd., "Synergistic acaricide composition", Chemical Abstracts, vol. 95, No. 1, 6 Jul. 1981, Abstract No. 1918d.
Rathburn et al., "Tests of resmethrin with several synergists in a laboratory wind tunnel against caged adult mosquitos", Chemical Abstracts, vol. 85, No. 19, 8 Nov. 1976, Abstract No. 13845t.
Nippon Seika KK, "Prepn. of insecticide to control Thrips palmi--contains camphor, para:di:chloro:benzene, naphthalene or D-empenthrin", Chemical Patents Index, Documentation Abstracts Journal, Section Ch, Week 9049, 13 Feb. 1991, Derwent Publications Ltd., London, GB; Class C, AN 90-365870/49.

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