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Susceptibility of the Face Fly to Commercial Preparations of Bacillus thuringiensis1

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The effect of Bacillus thuringiensis toxins on various stages of the face fly, Musca autumnalis De Geer, was determined Supernatants of the commercial crude material added to cow feces gave LD50 values for last-instar larvae ranging from 2.06 to 9.46 parts per thousand. In comparative tests with various aged larvae the younger individuals were found more susceptible to the toxic supernatant preparation. When 12-hour-old larvae were exposed to feces collected from dairy cows fed the crude commerical preparations, sufficient toxin was present to produce 100% mortality. The results suggest that it may be possible to use such a preparation as a feed additive to control the face fly.

Document Type: Research Article

Publication date: June 1, 1967

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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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