桑园专用杀虫剂的田间药效筛选及家蚕残毒试验

摘要

[目的]筛选出对桑园害虫防治效果好,桑叶残毒对家蚕影响小的杀虫剂.[方法]采用室内毒力测定、田间药效试验、农药残留速测以及残毒测定相结合的方法进行试验.[结果]室内毒力测定结果表明,桑树1号对桃粉绿芽的LC50为(316.1±57.3)mg/kg,桑树1号在药后14 d,防效达62.58%;药后7d的农药残留速测显示可安全饲育家蚕,达到用叶标准.[结论]推荐桑树1号作为桑园专用杀虫剂使用.%[ Objective] The paper was to screen the pesticides with good control effects against pests in mulberry and small impact on silkworm. [ Method ] The combined method of indoor toxicity test, field efficacy test, fast testing of pesticide residues and residual toxicity determination were adopted to carry out test. [ Result ] Indoor toxicity results showed that LC50 of Mulberry No. i against Hyalopterus amygdale was ( 316.1 ± 57.3 ) mg/kg, and the control effect of Mulberry No. I at 14 d reached 62.58％; fast testing of pesticide residues at 7 d showed that the mulberry leaves were safe to silkworms, which reached the standard of leaves for silkworm. [ Conclusion] Mulberry No. I was recommended to be the special pesticide to apply in mulberry field.