A long-term exposure bioassay was conducted to evaluate the effects of two insecticides (chlorpyrifos and DDT) on the aquatic midge Chironomus tentans. Both DDT and chlorpyrifos affected the survival and adult emergence of midges in a dose dependent manner. The exposure of midges to chlorpyrifos reduced the general esterase activity by 48%. However, such an effect was not found in the midges exposed to DDT.
Species 1: Diptera Chironomidae Chironomus tentans
Keywords: toxicology
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