Residues of Fenthion and Five of its Metabolites: Their Persistence in Corn and Grass Forages

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Abstract:

Coastal bermudagrass and corn treated with fenthion emulsifiable concentrate at 0.5, 1.0, and 2.0 lb per acre and sampled 0, 1, 2, 7, 14, and 21 days posttreatment were analyzed for fenthion and 5 of its metabolites (oxidation products). In the field, extensive oxidation of fenthion to the metabolites (primarily to fenthion sulfoxide) occurred almost immediately. Residues of all 6 compounds were detected in the grass, and residues of 5 compounds (no fenthion oxygen analog) were detected in the corn after various intervals of weathering in the field.

Residues of fenthion and the metabolites in corn ensiled in gallon jars were persistent and oxidized at a lower rate in silage than in the field.

Document Type: Research Article

Publication date: December 16, 1968

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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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