Fate of Acephate in the Cotton Plant

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Studies using 14C acephate and thin-layer chromatography (TLC) showed that foliarly applied acephate is rapidly absorbed into cotton leaf tissue, with nearly 40% of the applied acephate present in the leaf tissue at 24 h post treatment. Successive foliar applications at 5-day intervals indicated that minute amounts of acephate are trans located into the fruiting form. Although the amount of acephate in the fruiting form increased after three successive foliar applications, the concentration of acephate probably would not be high enough to be insect toxic. Foliar applications of acephate followed by analyses of the entire cotton plant for acephate and its primary metabolite, methamidophos (O,S-dimethyl phosphoramidothioate), by using gas chromatography, indicated that acephate has a half-life of 8 days in the cotton plant.

Document Type: Research Article

Publication date: October 1, 1982

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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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