Abstract
Hydrolysis studies were conducted on aldicarb, aldicarb sulfoxide and aldicarb sulfone for 186 to 228 d. These long-term studies show that, for a given temperature, the reaction rate constants for the three compounds are relatively constant below pH 7 and increase rapidly as the pH increases beyond 7. These rate constants generally result in shorter half-lives (under two years in most environments) than previously assumed, and would result in aldicarb residues being less persistent in groundwater than previously expected.
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