二化螟对杀虫剂的敏感性及抗药性研究

Study of susceptibility and resistance of Chilo suppressalis Walker to insecticides:

研究了二化螟对常用杀虫剂有机磷、沙蚕毒系、氨基甲酸酯和新药剂锐劲特、阿维菌素的敏感性和田间药效 ,同时比较了杭嘉湖地区二化螟对杀虫单的抗性差异并开展了杀虫剂混配试验。结果表明 :二化螟对锐劲特、阿维菌素及三唑磷的敏感性较高 ,而对灭多威、杀虫单、杀虫双等敏感性低 ;用药水平高的杭州地区 ,二化螟对杀虫单已产生了较高抗性 ,而安吉、嘉兴地区的抗性也正在发展之中 ;三唑磷与辛硫磷、阿维菌素 ,灭多威与水胺硫磷混配 。

Lab toxicity and field control of insecticides to Chilo suppressalis Walker were tested,resistance of monosultap in Hangzhou Jiaxing Huzhou region monitored,and synergism of insecticide mixtures valued.The results showed that susceptibility of the borer to insecticide is in the order as follws:abamectin,fipronil>organophosphorus>carbamate>nereistoxin.Resistance ratio of monosultap in Hangzhou strain of the borer in 1999 is 31.42 fold,Huzhou and Jaixing strains are 13.90 and 7.27 fold,respectively,compared with susceptible strain of Sichuan.Mixtures of triazophos and abamectin or phioxim,isocarbophos and methomyl seem to be synergitic to the borer.