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Organophosphorus and Carbamate Insecticides as Soil Treatments Against the Eye Gnat, Hippelates collusor, in the Laboratory1

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Twenty-four organophosphorus compounds, three carbamate insecticides and one chlorinated hydrocarbon insecticide (Thiodan® have been screened in the laboratory as soil treatments against the eye gnat Hippelates collusor (Townsend). (Chemical definitions of proprietary materials are listed below.) Of the organophosphorus compounds, Co-Ral®, Bayer 25141, Experimental Nematocide 18133, Bayer 29493, GC-4072, Ethyl Guthion®,Trithion®, GC-3582, ronnel, G-30494, phorate, Bayer 22408, Methyl Trithion®, GC-3583, ethion, Guthion®, Di- Syston®, and Delnav® manifested a high degree of initial activity against the gnat. The first four compounds in this group had the greatest activity while Di-Syston ami Delnav were less effective. Relatively moderate dosages of dimethoate and parathion were required for 90% reduction of the gnats. American Cyanamid Compound 18706, Dylox®, phosphamidon, and dicapthon proved effective only' at higher dosages. Thiodan was ineffective at practical dosages.

Of the carbamate insecticides, AC-5727 was most efficient in reducing eye-gnat emergence from treated soil. Sevin® was effective, but only when applied in greater quantities, and m-tbutylphenyl N-methylcarbamate did not indicate appreciable activity at the rates used here.

Document Type: Research Article

Publication date: December 1, 1960

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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