Aldicarb Metabolism in Twospotted Spider Mites12

Abstract
Tetranychus urticae Koch rapidly absorbed and metabolized aldicarb. Aldicarb sulfoxide or 2-methyl-2-(methylsulfinyl) propionaldehyde O-(methylcarbamoyl) oxime, the major organosoluble metabolite, comprised 55.1 and 47.4%, respectively, of the organosoluble radioactive material after exposure intervals of 6 and 24 h. Absorption and metabolism of aldicarb sulfoxide-14C by twospotted spider mites proceeded at a slower rate than that of aldicarb. Major identified organosoluble metabolites of aldicarb sulfoxide after 24 h were aldicarb oxime sulfoxide or 2-methyl-2-(methylsulfinyl) propionaldehyde oxime (16.7%) and aldicarb oxime sulfone or 2-methyl-2-(methylsulfonyl) propionaldehyde oxime (18.2%).

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