不同种类杀虫剂对美洲斑潜蝇及天敌的作用评价

应用干扰控制指数(ⅡPC)的方法评价了几种杀虫剂对美洲斑潜蝇的控制效果，结果表明，在供试的几种杀虫剂中，控制效果较好的有48％毒死蜱、18％杀虫双及阿维菌素类的绿宝，ⅡPC值分别是0．111，0．119和0．124；而24％灭多威对美洲斑潜蝇控制效果较差，ⅡPC值为0．434．对美洲斑潜蝇寄生性天敌的排除控制指数(EIPC)分析表明，几种杀虫剂中以使用绿宝对天敌的EIPC值为最大，以杀虫双及毒死蜱次之，而以灭多威最小，亦即绿宝对天敌最为安全，其使用区内天敌仍发挥着较大的作用；灭多威对天敌的杀伤力最大．经室内毒力测定也得出了类似的结果．

Evaluation of control effect of several insecticides on Liriomyza sativae and its natural enemies

The control effects of several pesticides on population of both the leafminer Liriomyza sativae and its natural enemies were evaluated by means of the interference index of population control (IIPC) and exclusion index of population control (EIPC). The results showed that the leafminer population could be controlled effectively by abamectin, chlorpyrifos (48%) and dimehypo (18%). Their IIPC-values were estimated to be 0.124, 0.111 and 0.119, respectively. Among them the EIPC-value of abamectin was maximum which indicated that the affect of application of abamectine on the population of leaf miner's natural enemies was less significant. The results of both application evaluation in field and toxic test in laboratory indicated that the application of methomyl (24%) affected the natural enemies' population of the leaf miner.