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外文期刊>Environmental toxicology and chemistry
>Effect of varying pesticide exposure duration and concentration on the toxicity of carbaryl to two field-collected stream invertebrates, calineuria californica(Plecoptera: Perlidae) and cinygma sp.(ephemeroptera: heptageniidae)
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Effect of varying pesticide exposure duration and concentration on the toxicity of carbaryl to two field-collected stream invertebrates, calineuria californica(Plecoptera: Perlidae) and cinygma sp.(ephemeroptera: heptageniidae)
The effect of exposure duration on the toxicity of a forest insecticide (carbaryl) was assessed under environmentally realistic exposure regimes against two stream invertebrates indigenous to the United States Pacific Northwest, Calineuria californica (Plecoptera: Perlidae) and Cinygma sp. (Ephemeroptera: Heptageniidae). Laboratory bioassays were conducted to evaluate the relationship between pulsed exposures of 15, 30, and 60 min and toxicity for a range of chemical concentrations(10.2-1,730 μg/ L). For Cinygma sp., the 50/100 lethal concentration(LC50) values wee calculated as 848 μg/L(15 min), 220 μg/L(15 min), 220 μg/L(30 min), and 165 μg/L (60 min).
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