27种农药对家蚕的毒性评价研究

Toxicity Evaluation of Twenty-seven Pesticides to Bombyx mori

采用浸叶法在室内测定了27种农药对家蚕的急性毒性,并根据其毒性范围进行分级,评价了其对环境的安全性。结果表明:有2种药剂的LC50<0.1mg/L,属于特高毒级;8种药剂的LC50为0.1～10mg/L,属于高毒级;7种药剂的LC50为10～1000mg/L,属于中等毒级;10种药剂的LC50>1000mg/L,属于低毒级。就农药对家蚕的毒性测定方法进行了讨论。

The acute toxicity of twenty-seven pesticides to silkworm, Bombyx mori L., was evaluated in laboratory using Leaf dipping method; the grade was compartmentalized according as toxicity scope and the safety evaluation was made for these pesticides. The results indicate that the LC_(50 ) of two insecticides is lower than 0.1 mg/L(belong to special high toxicity grade); that of eight (insecticides) between 0.1~10 mg/L(belong to high toxicity grade); that of seven pesticides between( 10~1 000 mg/L)(belong to middling toxicity grade; that of ten pesticides higher than 1 000 mg/L((belong to low toxicity grade)). And the method of toxicity determining of pesticide to silkworm was discussed.