Resistance to Chlorinated Hydrocarbon Insecticides in the Eye Gnat, Hippelates collusor1

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Abstract:

Populations of Hippelates collusor (Townsend) collected in 1960 in the Coachella Valley and in Orange County of southern California were compared by a contact method for susceptibility to dieldrin, lindane, DDT and parathion. The Coachella Valley population demonstrated nearly complete immunity to dieldrin and resistance factors of 50 X and 1l X to lindane and DDT, respectively. A Coachella Valley population collected in 1957 and reared in the laboratory without further exposure to insecticides, was found in 1960 to have evidently retained nearly complete immunity to dieldrin and 15- and 2-fold levels of resistance to lindane and DDT, respectively. Susceptibility to parathion was almost identical in all populations tested. Resistance to chlorinated hydrocarbon insecticides in the Coachella Valley population is a consequence of the widespread use of insecticides in agricultural soils in which the species normally breeds.

Document Type: Research Article

Publication date: August 1, 1961

More about this publication?
  • 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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