【摘要】 [目的]为不同盐度下氯氰菊酯的使用和调控提供科学依据。[方法]采用静水生物法,研究了不同盐度下氯氰菊酯对凡纳滨对虾的急性毒性效应。[结果]在盐度20和5下氯氰菊酯对凡纳滨对虾的24、48、72、96 h半致死浓度(LC50)分别为0.767、0.440、0.383、0.038 2μg/L和0.437、0.313、0.203、0.170μg/L。在中、低盐度下氯氰菊酯对凡纳滨对虾的安全浓度(SC)分别为0.038 2和0.017 0μg/L。[结论]极低浓度的氯氰菊酯农药残留就可能会威胁凡纳滨对虾的养殖安全,应尽可能减少在虾塘及附近使用氯氰菊酯。更多还原

【Abstract】 [Objective] The research aimed to provide scientific basis for the use and control of cypermethrin in different salinity.[Method] Using static bioassay test,the acute toxicity effect of cypermethrin on Litopenaeus vannamei in different salinity were studied.[Result] 24,48,72,96 h LC50 of cypermethrin to L.vannamei in the salinity of 20 and 5 were 0.767,0.440,0.383,0.038 2 μg/L and 0.437,0.313,0.203 and 0.170 μg/L respectively.In medium and low salinity,the safe concentration of cypermethrin to L.vannamei was 0.038 2 and 0.017 0 μg/L respectively.[Conclusion] Very low concentrations of cypermethrin pesticide residues might threaten the safety of L.vannamei culture,so the use of cypermethrin should be reduced as possible in shrimp pond and its surrounding area.更多还原