【摘要】 <正> 黑尾叶蝉(Nephotettix cincticeps uhler)是我国水稻的主要害虫之一。它不仅刺吸稻株汁液直接危害水稻,而且还传播水稻普通矮缩病、黄矮病等病毒病,严重影响了水稻的稳产高产。长期以来对黑尾叶蝉主要是应用有机磷杀虫剂1605、马拉松、乐果等防治,其中马拉松效果尤为显著。但近年来,在用药水平高的地区普遍反映防治效果下降,不少地区更多还原

【Abstract】 By combining bioassay technique with enzymatic determination in vitro, the mechanisms of resistance and synergism to some insecticides in organopbosphorus-resis-tant green leafhoppers have been studied. The results are briefly stated as follows:(1)The increase of carboxylesterase activity may be the cause of resistance of the green leafhopper against Malathion.(2)Carbozylesterase plays a more important role in the resistance of the green leafhopper against Dimethoate than the mixed function oxidase (mfo).(3)The fungicide Kitazin strongly synergizes the toxicity of Malathion and Dimethoate against the resistant green leafhopper and the degree of its synergistic action is similar to that of TPP. The enzymatic study shows that Kitazin strongly inhibits carboxylesterase in vitro. Thus the synergism of Kitazin might be due to its highly effective inhibition to carboxylesterase.更多还原