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SHENG Xiu-Mei XIONG Li TANGHong-Feng 《水生生物学报》2006,12(6):1-679
LY-04 and WSQIF are newly-synthesized compounds which were presented by the Institute of Pesticides Chemistry, Central China Normal University. LY-04 belongs to α-oxophosphonic acid derivatives, while WSQIF is an aromatic acetyl oxophospho04 and WSQIF were determined in S. obliquus cells at 24h, 48h, 72h, 96h represented by cell density. Our data showed that the 24h, 48h, 72h, 96h EC50 of LY-04 were 1983mg/L, 2943mg/L, 240mg/L and 65.0mg/L acetone, respectively, and the 24h,48h, 72h, 96h EC50 of WSQIF were 15.9mg/L, 53.0mg/L, 98.0mg/L and 28.8mg/L respectively. LY-04 displayed a higher insecticidal activity, while WSQIF showed a higher phytocidal activity. As LY-04 and WSQIF were designed to act as insecticide and herbicide, respectively, the results were in contrast to the anticipated ones. According to the toxicant classification standard,EC50 of both substances was far higher than 3mg/L, while the toxicity of LY-04 and WSQIF to aquatic algae were fairly low, indicating that these two pesticides are rather safe to the aquatic ecosystem. 相似文献
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LY-04和WSQIF是由华中师范大学农药所合成的两种新型有机磷农药,LY-04属于α-氧代膦酸衍生物,WSQIF属于芳氧基乙酰氧基烃基膦酸脂。选用斜生栅藻(ScenedesmusobliquusKütz.)作为实验生物,通过显微计数测定藻细胞的密度以计算LY-04和WSQIF对斜生栅藻24h、48h、72h、96h的半效应抑制浓度(EC50),研究其对斜生栅藻的毒性效应。结果表明:以丙酮为溶剂时,每隔24h取样,测得LY-04对斜生栅藻的48h、72h、96h的EC50值分别为2942.5mg/L、239.7mg/L和65.0mg/L,而WSQIF的24h、48h、72h、96h的EC50值分别为15.9mg/L、53.0mg/L、98.0mg/L和28.8mg/L。LY-04和WSQIF分别作为杀虫剂和除草剂而研制,经活体研究表明,LY-04具有较强的杀虫活性,WSQIF则具有很强的除草活性,所得EC50值基本符合设计结果。根据毒性分级标准,LY-04和WSQIF的EC50值远大于3mg/L,其对非靶生物中的水生藻类都属于低毒,可推广应用。 相似文献
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