Metabolism of UC-21149 (2-Methyl-2-(methylthio)propionaldehyde O-(methylcarbamoyl)oxime) in Cotton Plants and Soil in the Field

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Metabolism of S35-labeled UC-21149 (2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl)oxime) in cotton plants and its fate in soil under normal field conditions was investigated. After 2 days the compound was completely metabolized in individually treated leaves, primarily to the toxic sulfoxide derivative 2-methyl-2-(methylsulfinyl) propionaldehyde O-(methylcarbamoyl) oxime. Once formed, the sulfoxide was relatively stable; the biological half-life was about 1 week and 14% of the applied dose was still in this form after 32 days. Studies of translocation demonstrated that there was little movement of radioactivity from treated leaves to untreated areas of the cotton plants. UC-21149 and at least 10 of its derivatives were detected in treated soil. Of these, the sulfoxide was usually the dominant product; UC-2l149 was essentially depleted after 1 week. After 8 weeks, 86.3% of the applied radioactivity was lost from the treated soil, either by volatilization or by movement as a result of moisture from rainfall and irrigation.

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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