Acute Toxicity of Clethodim, Cypermethrin and 2,4-D-butylate to the Larva of Chironomus sinicus  

烯草酮、氯氰菊酯和2-4D丁酯对中华摇蚊(Chironomus sinicus)幼虫的急性毒性试验(英文)

作　　者：王镇江[1] 刘曼红[1] 郭立新[1] 马玉堃[1] 

机构地区：[1]东北林业大学野生动物资源学院,黑龙江哈尔滨150040

出　　处：《Agricultural Science & Technology》2014年第9期1583-1585,1609,共4页农业科学与技术（英文版）

基　　金：Supported by Fundamental Research Funds for the Central Universities(2572014EA0703);Innovation Experiment Program for University Students from Northeast Forestry University(201310225108)~~

摘　　要：[Objective] The aim of this study was to detect the acute toxicity of clethodim, cypermethrin and 2,4-D-butylate. [Method] Chironomus sinicus larvae were exposed to different concentrations of clethodim, cypermethrin and 2,4-D-butylate. Survival rate, lethal concentration 50 （LC50） and superoxide dismutase （SOD） activity in the homogenate of the larvae were monitored to detect the toxicity of the pesti- cides. [Result] The survival rates of C. sinicus larvae exposed to cypermethrin and 2,4-D-butylate for 12 h were almost unchanged at different concentrations, but de- creased with concentration increasing 48 h later. For each pesticide, the differences in survival rates of C. sinicus larvae at 48 h were significant. The 48 h LC50 of clethodim, cypermethrin and 2,4-D-butylate to C. sinicus larvae were 1.842, 0.150 and 1.999 mg/L, respectively. The acute toxicity of cypermethrin was the highest a- mong the three pesticides and that of 2,4-D-butylate was the lowest. Clethodim sig- nificantly reduced the SOD content in a dose-dependent manner. 2,4-D-butylate also reduced SOD content in C. sinicus larvae, but the reduction was not significantly re- lated to its dosage. However, cypermethrin showed no significant effect on SOD ac- tivity in C. sinicus larvae.[目的]评价农药对水生生物的毒理效应。[方法]采用静水法研究烯草酮、氯氰菊酯和2-4D丁酯对中华摇蚊(Chironomus sinicus)幼虫的急性毒性效应。分别设定不同浓度梯度进行急性暴露试验,于48 h时测定摇蚊幼虫组织匀浆超氧化物歧化酶(SOD)的活性。[结果]在氯氰菊酯和2-4D丁酯处理摇蚊幼虫后12 h后,不同浓度间的存活率无显著差异,在48 h时随着农药浓度的增加,存活率下降。烯草酮、氯氰菊酯和2-4D丁酯对中华摇蚊幼虫48 h的LC50分别为1.842、0.150和1.999 mg/L,氯氰菊酯对中华摇蚊幼虫的毒性最高,其次为烯草酮,2-4D丁酯毒性最低。烯草酮对中华摇蚊幼虫组织SOD含量有明显影响,表现出剂量-效应关系;2-4D丁酯对组织SOD含量有明显影响,但未表现出剂量-效应关系;而氯氰菊酯对组织SOD含量则无明显影响。[结论]该研究为水体污染监测和水环境中农药的残留提供理论依据。

关 键 词：Chironomus sinicus Acute toxicity CLETHODIM CYPERMETHRIN 2  4-D- butylate Superoxide dismutase 

分 类 号：S481.1[农业科学—农药学]