91种农药制剂对家蚕的急性毒性研究

Acute Toxicity Evaluation of Ninety-one Pesticides to Silkworm

为评价农药对家蚕的环境安全性,作者采用毒叶饲喂法在室内测定了91种农药对家蚕(Bombyx mori L.)的急性毒性,并根据其毒性范围进行分级,结果表明:有30种药剂的LC50<0.5mg/kg桑叶,属于剧毒级,包括甲氨基阿维菌素苯甲酸盐、阿维菌素、高效氯氰菊酯、联苯菊酯、虫酰肼、三唑磷等;有15种药剂的LC50为0.5～20mg/kg桑叶,属于高毒级,如丁硫克百威、虫螨腈、杀铃脲、氟虫腈、噻嗪酮、高渗氯胺磷、敌百虫;19种药剂的LC50为20～200mg/kg桑叶,属于中等毒级;27种药剂的LC50>200mg/kg桑叶,属于低毒级。

The acute toxicity of ninety-one pesticides to silkworm, Bombyx mori L., was evaluated in laboratory using the intake toxic leaf method, the toxic grades were compartmentalizedaccording to the results and the safety evaluation was made for these pesticides. The LC50 values of thirty pesticides were lower than 0.5mg/kg mulberry （belonged to extremely toxic grade）, including emamectin benzoate, abamectin, beta-cypermethrin, bifenthrin, tebufenozide and triazophos etc. ; The LC50 values of fifteen pesticides were between 0.5-20mg/kg mulberry （belonged to high toxic grade）, including carbosulfan, chlorfenapyr, triflumuron, fipronil, buprofezin, chloramine phosphorus and trichlorfon etc. ; that of ninety pesticides were between 20-200mg/kg mulberry （belonged to moderate toxic grade） ; That of twenty-seven pesticides were higher than 200mg/kg mulberry （belonged to low toxic grade）.