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首页> 外文期刊>Journal of pesticide science >Acute aquatic toxicity of metofluthrin metabolites in the environment
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Acute aquatic toxicity of metofluthrin metabolites in the environment

机译：甲氟氰胺代谢产物在环境中的急性水生毒性

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摘要

Acute aquatic toxicity of eight major metabolites of the pyrethroid insecticide metofluthrin, potentially formed via oxidation and ester cleavage in the environment, was examined using three representative species, fathead minnow (Pimephales promelas), Daphnia magna and green alga (Pseudokirchneriella subcapitata). All metabolites showed a wide range of toxicity but were more than a hundredfold and tenfold less toxic than metofluthrin to pyrethroid-sensitive (fish and daphnid) and -insensitive (algal) taxa, respectively; 0.44 to >120mg/L (fish 96-hr LC_(50)), 6.3 to > 120 mg/L(daphnid 48-hr EC_(50)), and 2.6 to >110mg/L (algal 96-hr E_yC_(50)). The structural modification via ester cleavage and/or oxidation was found to significantly control the acute aquatic toxicity of the metabolites. The decreased lipophilicity in the metabolites generally resulted in much less acute toxicity, the extent of which was dependent on an introduced functional group such as formyl as a toxicophore and carboxyl causing a higher acidity.
机译：使用三种代表性物种，黑头fat鱼（Pimephales promelas），大型蚤（Daphnia magna）和绿藻（Pseudokirchneriella subcapitata）对拟除虫菊酯杀虫剂甲氟菊酯的八种主要代谢产物的急性水生毒性进行了研究，这些代谢物可能是通过环境中的氧化和酯裂解形成的。所有代谢产物对拟除虫菊酯敏感（鱼类和蚤类）和对拟除虫菊酯敏感的（藻类）类群的毒性均较美氟菊酯低，分别比甲氟蝶呤低一百倍和十倍。 0.44至> 120mg / L（鱼96小时LC_（50）），6.3至> 120 mg / L（水蚤48小时EC_（50））和2.6至> 110mg / L（藻类96小时E_yC_（50 ））。发现通过酯裂解和/或氧化的结构修饰显着控制了代谢物的急性水生毒性。代谢物中亲脂性的降低通常会导致急性毒性降低得多，急性毒性的程度取决于所引入的官能团，例如甲酰基作为有毒基团，而羧基会导致较高的酸度。

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