Metabolism of Diazinon-C14 in Western Corn Rootworm Beetles1

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Western corn rootworm beetles, Diabrotica virgitera Le- Conte, were treated topically with radioactive diazinon (C14.ethoxy and CH-ring labeled) , placed in a metabolism chamber, and analyzed at 1, 8, and 16 hours posttreatment to ascertain the fate of the compound. Diazinon was rapidly absorbed and degraded. Nonhydrolyzed absorbed radioactive materials included the parent compound and a metabolite that behaved chromatographi. cally as the oxygen analog, diazoxon (diethyl 2-isopropyI- 6-methyl-4-pyrimidinyl phosphate). The major degradation pathway was cleavage of the P-O-pyrimidinyl bond of diazinon and/or diazoxon yielding a phosphorus-containing acid and 6-hydroxy-2-isopropyl-4-methylpyrimidine. Expired C14 O2 during the l6-hour test period never exceeded 0.7% of the total recovered dose.

Document Type: Research Article

Publication date: April 1, 1969

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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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