Comparative Toxicities of Insecticides to House Fly Larvae and Macrocheles muscaedomestica, a Mite Predator of the House Fly1

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The concentration-mortality curves for 17 insecticides were detetrmined for third-instar larvae of the house fly, Musca domestica L., and adult female Macrocheles muscaedomesticae (Scopoli), a manure-inhabiting mite predaceous on house fly eggs and first-instar larvae. The mites and fly larvae were exposed to insecticides incorporated into fly-rearing medium. Bayer 39007 (o-isopropoxyphenyl methylcarbamate), dichlorvos, fenthion, malathion, CiodrinĀ® (alpha-methylbenzyl 3-hydroxycrotonate dimethyl phosphate) , and naled were more toxic to the mites than to the fly larvae. Dimetilan and chlordane were more toxic to the mites than to the fly larvae at the LC93 level although the converse was exhibited at the LC50 level. Diazinon was about equally toxic to the mites and to the fly larvae. DDT, trichlorfon, and ronnel were slightly more toxic to the fly larvae than to the mites. KeponeĀ® (decachlorooctahydro-1,3,4-metheno-2H -cyclobuta[ed] pen- taIen-2-one) , dimethoate, lindane, GC 98 9 (4-hydroxy-2- mercaptobutyric acid, gamma-lactone, S-ester with O,O- diethyl phosphorodithioate), and coumaphos were more toxic to the fly larvae than to the mites with the first two exhibiting the greatest selectivity.

Intensified efforts to identify selective chemicals for house fly control is advocated as a step in the development of a reliable integrated house fly control program for lise around animal shelters.

Document Type: Research Article

Publication date: October 1, 1966

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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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