Field Studies of House Fly Resistance to Diazinon, Ronnel, and Other Insecticides1

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House fly(Musca domestica L.) populations and their resistance to insecticides were studied in 1960 and 1961 in 30 barns in Monmouth County, New Jersey. Barns were located within a 5-mile radius of key barns sprayed with Diazinon® (0,0- diethyl 0-(2-isopropyl-4-methyl-6-pyrimidinyl) phosphorothioate) or ronnel for 5 years or more. Resistance to Diazinon, ronnel, malathion, lindane, and DDT was present in varying degrees at all locations. Resistance to Diazinon was highest at barns treated with that insecticide and decreased as distance increased. Resistance to ronnel was highest at barns treated with organophosphorus compounds. Resistance to malathion did not show a clear pattern in relation to locations where it was used. Resistance to lindane and DDT were at a high level throughout the area. In general, resistance to all compounds was higher in 1961 than in 1960. Within a season, resistance to Diazinon and ronnel was high at the beginning of the season, but first decreased rapidly after which it gradually increased in intensity for the rest of the season. Fly populations were somewhat larger in 1961 than in 1960 though the patterns of increase were the same each year. A high breeding potential in barns resulted in increased resistance where residual sprays were used. Increase in resistance within a season is dependent upon sanitation, weather conditions, and migration of flies.

Document Type: Research Article

Publication date: October 1, 1962

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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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