Toxicity of Malathion to Gamma-Irradiated and Nonirradiated Adult Red Flour Beetles1,2,3,4

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Tests were conducted to determine the effect of combining treatments of malathion and gamma radiation applied to adult Tribolium castaneum (Herbst). Radiation was applied before the chemical treatment. The dosage of 5 krad did not produce any mortality when applied alone and actually afforded some protection to the in- sects against the malathion. At dosages of 10 krad or more, however, radiation combined with malathion at the rate 0.05 g/ insect was slightly more lethal than either malathion or radiation alone. Combination treatments produced earlier mortalities than did radiation alone.

Document Type: Research Article

Publication date: February 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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