农药对泰国支虾的致死效应。

W Thaimuangphol, P Kasamesiri
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引用次数: 0

摘要

在农业活动中,大量使用杀虫剂和除草剂来控制害虫。过量喷洒农药可能污染淡水水体,并对水生动物产生重大影响。为了确定农药的潜在风险,对杀虫剂和除草剂对泰国Branchinella boplii fairy shrimp的急性毒性进行了评价。将不同浓度的杀虫剂(毒死蜱和威威)和除草剂(百草枯和2,4- d)分别暴露于不同浓度的杀虫剂(毒死蜱和威威)和除草剂(百草枯和2,4- d) 24 h,比较LC50值。急性毒性试验测定毒死蜱24 h LC50值为0.00186 mg/L,西威因LC50值为0.21 mg/L。除草剂、百草枯和2,4- d的LC50分别为0.11 mg/L和27.91 mg/L。因此,毒死蜱杀虫剂对虾蛄的毒性大于除草剂(2,4- d和百草枯)。农药的高毒性对施用区域的水生生物具有长期和潜在的破坏性影响。
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LETHAL EFFECTS OF PESTICIDES ON THE NAUPLII FAIRY SHRIMP, BRANCHINELLA THAILANDENSIS.

During agricultural activities, large amounts of insecticides and herbicides are used for controlling pests. The overspraying of pesticides may contaminate freshwater bodies, as well as having a significant effect on aquatic animals. To determine the potential risk of pesticides, the acute toxicity of insecticides and herbicides on the nauplii fairy shrimp, Branchinella thailandensis were evaluated. The organisms were exposed to different concentrations of insecticides (chlorpyrifos and carbaryl), and herbicides (paraquat and 2,4-D) for 24 h, after which the LC50 values were compared. The acute toxicity tests determined that the LC50 values of chlorpyrifos and carbaryl after 24 h were 0.00186 mg/L and 0.21 mg/L, respectively. For herbicides, paraquat and 2,4-D, the LC50 values were 0.11 mg/L and 27.91 mg/L. Therefore, chlorpyrifos insecticides were found to be more toxic than herbicides (2,4-D and paraquat) with regard to the nauplii fairy shrimp. The high toxicity of pesticides has a long-term, and potentially damaging effect on aquatic organisms in the application areas.

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