摘要
以鲫鱼 ( Carassiusauratus)、泥鳅 ( Misgurnusanguillicaudatus)、大型蚤( Daphiniam agna)、田螺 ( Viviparuschengtehensis) 等水生动物材料, 在20℃条件下应用换液的方法进行了灭扫利的急性毒性试验, 同时对鲫鱼进行亚急性暴露, 研究农药灭扫利对鱼体器官的损伤作用。试验结果: ①对鲫鱼48h 的半致死浓度( L C50) 为0011m g/ L, 泥鳅的 L C50为0112m g/ L、田螺的 L C50为231m g/ L, 对大型蚤24h 的 E C50为020m g/ L。②在亚急性暴露中,大于00014m g/ L的灭扫利试验溶液, 对鲫鱼的肝脏有明显损伤作用。实验结果还获得灭扫利对鲫鱼的最大无影响浓度 ( N O E C) 为00007m g/ L, 最低有影响浓度 ( L O E C) 为00014m g/ L, 其最大允许浓度 ( M A T C) 估计为0001m g/ L, 应用系数为01。
Acute toxicity experiments of meothrin to Carassius auratus,Misgurnus anguillicaudatus,Daphinia magna and Viviparus chengtehensis were carried out by using renewal method under the conditions of 20±1℃ and pH 7 8 8 1,and sub acute exposure to C.auratus was also conducted to determine the damage of meothrin to fish's organ.The results showed that the LC 50 values of meothrin in 48h for C.auratus,M. anguillicaudatus and V.chengtehensis were 0 011mg/l,0 112mg/l,2 310mg/l,respectively,the 24h EC 50 for D.magna was 0 20mg/l.In sub acute exposure tests,Meothrin liquor of exceeding 0 0014mg/l damaged obviously to the liver of C.auratus. Results from 60d sub acute test of C.auratus indicated that the MATC was estimated 0 001mg/l and the application factor was 0 1.
出处
《西南农业学报》
CSCD
北大核心
1999年第3期117-121,共5页
Southwest China Journal of Agricultural Sciences