Metabolism of Chloropropylate and Bromopropylate Acaricides by Twospotted Spider Mites1 and House Flies2,3

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Chloropropylate® (isopropyl 4,4'-dichlorobenzilate) and Acarol® (bromopropylate; isopropyl 4,4'dibromobenzilate) are chemically related specific acaricides. Toxicity of chloropropylate and bromopropylate to the twospotted spider mite, Tetranychus urticae Koch, determined by the slide-dip technique was 3.3 and 2.9 ppm, respectively, whereas toxicity to the house fly, Musca domestica L., determined by topical application, was greater than 500 ppm. Spider mites and house flies absorbed and metabolized the 14C labeled benzilate acaricides; metabolites tentatively identified by cochromatography included the respective halogen-substituted benzilic acid, benzhydrol, benzophenone, and benzoic acid. Although differences in both penetration and metabolism of chloropropylate and bromopropylate were detected between spider miles and house flies, they were not substantial enough to account for the marked selective toxicity of the 2 acaroides.

Document Type: Research Article

Publication date: December 1, 1972

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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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