Arrested Feeding of the Asiatic Rice Borer (Lepidoptera: Pyralidae) by Bacillus thuringiensis

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Arrested feeding of the Asiatic rice borer, Chilo suppressalis (Walker) by the Bacillus thuringiensis Berliner formulations Dipel and Thuricide was tested in the laboratory. Larvae were fed B. thuringiensts incorporated into artificial diet for 48 h, after which they were transferred to diet free of B. thuringiensis. The relative amount of B. thuringiensts ingested was determined by weighing the larvae and diet. The endotoxin inhibited feeding after an initial dose was ingested, but some larvae recovered after 36, 60, and 84 h on the diet free of B. thuringiensis. Mortality was low even after 180 h. Probit analysis based on arrested feeding rather than mortality showed no significant differences in toxicity between the products. Measuring feeding activity of Asiatic rice borer on artificial medium provides a method of comparing effectiveness of B. thuringiensis materials for this insect.

Document Type: Research Article

Publication date: April 1, 1989

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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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