Fate of chlorpyrifos in outdoor pond microcosms and effects on growth and survival of bluegill sunfish

摘要

Three series of outdoor pond microcosms were treated with the organophosphorous insecticide chlorpyrifos to determine the fate of this compound and its ecological impact on an aquatic community. A variety of application regimes were used, including a one-time surface spray, three soil-water slurry applications, and combinations of spray and slurry applications. Maximum chlorpyrifos concentrations in microcosm water ranged from 0.03 to 2.58 μg/L. Chlorpyrifos disappeared rapidly after each spray application, probably due to volatilization from surface water, with an initial half-life of about 1 d.