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Fenvalerate Cross-resistance in a Resmethrin-selected Strain of the House Fly (Diptera: Muscidae)

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Resmethrin-selected house flies,Musca domestica L., were cross-resistant to fenvalerate. Fenvalerate was between 30- and 100-fold less toxic to resmethrin-selected flies (R) than to susceptible flies(5). While both DEF (S,S,S-tributyl phosphorotrithionate) and piperonyl butoxide (PB) significantly synergized fenvalerate (P < 0.05) in R flies, PB was 8-fold more effective than DEF. PB was not a good synergist in S flies. In R flies, PB did not affect the rate of fenvalerate penetration as measured by unpenetrated insecticide. GA4-282, (2,6-dichlorobenzyl-2 propynyl) ether, and PB synergized pyrethrins, resmethrin, and the carbamates Mobam, propoxur, and mexacarbate; the propynyl ether was more effective than PB with the carbamates, whereas PB was the better synergist for pyrethrins and resmethrin was synergized equally. GA4-282 had no effect on fenvalerate toxicity, although PB was markedly synergistic.

Document Type: Research Article

Publication date: February 1, 1985

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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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