白背飞虱不同地区种群的抗药性研究

Insecticide resistance of different populations of white-backed planthopper,Sogatella furcifera(Horváth)(Homoptera:Delphacidae).

测定了白背飞虱浙江和广西种群 (迁入虫源 )、云南和海南种群 (当地虫源 )的抗药性程度 ,以及与抗性相关酶系即非特异性酯酶、羧酸酯酶、谷胱甘肽 -S -转移酶和乙酰胆碱酯酶等比活力 .云南和海南种群对各药剂抗性水平明显较高 ,但个体异质性则低于浙江和广西种群 ;4种酶平均比活力以浙江和广西种群明显为高 ,其中浙江种群个体间酶活频率分布较宽而广西种群则相反 .最后 ,就白背飞虱不同种群抗药性水平及其相关酶活性的地区差异性与该飞虱长距离迁飞的关系进行了讨论 .

Resistance to some insecticides used commonly in different populations of the white-backed planthopper,Sogatella furcifera collected from Zhejiang,Guangxi,Yunnan and Hainan Province in China was measured.The specific activities of some resistance-associated enzymes,i.e.esterase,carboxylesterase,glutathione S-transferase and acetylcholinesterase from these populations were also measured.The resistant levels to malathion,methamidophos,isoprocarb and buprofezin were markedly higher in Yunnan and Hainan populations than in other populations,but considerably more heterogeneity in response to insecticides was found in Zhejiang and Guangxi populations.The specific activities of the enzymes were obviously higher in Zhejiang and Guangxi populations than in Yunnan and Hainan populations,and the distribution range of the enzyme activity was the widest in Zhejiang population,and the narrowest in Guangxi population.Finally,The relationship between the long-distance migration and the territorial difference in insecticide resistant level and activityes of the enzymes in the populations of this planthopper was discussed.