中文摘要：

氯虫苯甲酰胺具有高效、持久的杀虫活性,已在农作物害虫防治中广泛应用。为了明确蚕区桑园及农田使用氯虫苯甲酰胺对蚕业生产安全性的影响,采用定量喷雾法测定该杀虫剂对家蚕的急性毒性和慢性毒性。以药剂与桑叶的质量比作为LC50单位,氯虫苯甲酰胺对家蚕2龄幼虫的96 h LC50为0.002 32 mg/kg,属剧毒级,家蚕急性中毒症状主要表现为拒食、吐液,身体缩短、僵直等;添食低浓度（1/400-1/20 LC50）氯虫苯甲酰胺药液均可导致家蚕各龄发育历期延长,眠蚕体质量减轻,全茧量、茧层量、茧层率和结茧率下降,尤其是结茧率下降明显。鉴于氯虫苯甲酰胺对家蚕具有很强的急性毒性和慢性毒性,应当禁止在桑园及其周边农田使用。

英文摘要：

Chlorantraniliprole has been widely used in controlling crop pests for its high-efficiency and long-lasting insecticidal activity in recent years.To ascertain effect on sericultural production with its application in mulberry filed and farm land,quantitative spraying method was used to determine the acute and chronic toxicity of chlorantraniliprole to silkworm.With the ratio of pesticide dosage to mulberry leaf weight as unit of LC50,the test results indicated that LC50 of chlorantraniliprole was 0.002 32 mg /kg to the 2nd instar silkworm larvae at 96 h,indicating that chlorantraniliprole is a pesticide of special high toxicity grade to silkworm.The symptoms of acute toxicity mainly included antifeedant,vomiting,shrunk and rigid body.Larvae fed with low concentrations of chlorantraniliprole（1 /400-1 /20 of LC50） showed prolonged larval duration,lighter larval weight at ecdysis,lower cocoon weight,lower cocoon shell weight,lower cocoon shell percentage,and lower cocooning percentage.Especially,the cocooning percentage was lowered remarkably.Therefore,chlorantraniliprole should be forbidden to apply in mulberry field and vicinity farm land due to its high acute toxicity and chronic toxicity to silkworm larvae.