Effect of Temperature on the Toxicities of Ten Pyrethroids to German Cockroach (Dictyoptera: Blattellidae)

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Of 10 pyrethroids tested by topical application of male German cockroaches, Blattella germantca (L.), d-phenothrin was the least toxic at 19, 26, or 31oe. X-cyhalothrin was most toxic. Pyrethroids with the a-cyano moiety (fluvalinate, fenvalerate, cypermethrin, esfenvalerate, tralomethrin, cyfluthrin, and X-cyhalothrin) were more toxic than those without this functional group (d-phenothrin, resmethrin, and permethrin). At Le"o", toxicity was negatively related to temperature. Temperature-toxicity responses of five of seven a-cyano pyrethroids were parallel, possibly indicating qualitatively identical but quantitatively different levels of detoxification enzymes.

Document Type: Research Article

Publication date: October 1, 1991

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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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