抗联苯菊酯枸杞蚜虫羧酸酯酶活性及4种常用杀虫剂对酶的抑制作用
投稿时间：2017-07-17      点此下载全文 HTML
引用本文：牛婧玮,张丛,常静,等.抗联苯菊酯枸杞蚜虫羧酸酯酶活性及4种常用杀虫剂对酶的抑制作用[J].农药学学报,2017,19(6):755-759.
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作者单位E-mail
牛婧玮 内蒙古农业大学 农学院, 呼和浩特 010019  
张丛 内蒙古农业大学 农学院, 呼和浩特 010019  
常静 内蒙古农业大学 农学院, 呼和浩特 010019  
李海平 内蒙古农业大学 农学院, 呼和浩特 010019 lihaiping5820@hotmail.com 
刁青云 中国农业科学院 蜜蜂研究所, 北京 100093  
基金项目:国家自然科学基金（31260440）
中文摘要:采用玻璃管药膜法，测定了联苯菊酯对中国内蒙古地区枸杞蚜虫的毒力，同时研究了不同抗性水平枸杞蚜虫羧酸酯酶（CarE）的活性，比较了敏感种群Ⅰ和高抗性种群Ⅴ的Km和Vmax值，以及毒死蜱、三唑磷、灭多威及氧乐果4种常用杀虫剂对联苯菊酯不同抗性水平枸杞蚜虫CarE的抑制作用。结果表明：与实验室饲养的敏感种群Ⅰ（LC50值为0.057 mg/L）相比，不同地区枸杞蚜虫对联苯菊酯均产生了一定程度的抗性，其中种群Ⅴ的LC50值为4.344 mg/L，抗性倍数达76.2，已达到高抗性水平。随着对联苯菊酯抗性水平的提高，枸杞蚜虫CarE的比活力逐渐增大，高抗性种群Ⅴ的比活力[0.533 μmol/（min·mg）]是敏感种群Ⅰ[0.287 μmol/（min·mg）]的1.9倍。进一步比较敏感种群Ⅰ和高抗性种群Ⅴ的Km和Vmax值，发现Km值几乎无变化，但高抗种群Ⅴ的Vmax值是敏感种群Ⅰ的2.08倍。4种杀虫剂对不同抗性水平枸杞蚜虫CarE的抑制作用不同，但均随着试虫抗性水平的升高，抑制中浓度（I50）值增大。表明羧酸酯酶在枸杞蚜虫对联苯菊酯的抗性中具有重要作用。
中文关键词:杀虫剂  枸杞蚜虫  联苯菊酯  羧酸酯酶  抗性  抑制作用
 
Activity of carboxylesterase and inhibition effect of four insecticides on CarE in bifenthrin-resistant population of Aphis sp.
Abstract:The toxicity of bifenthrin to Aphis sp. was determined by the method of the residual film in glass tube. Carboxylesterase activity of Aphis sp. was measured. The Km and Vmax of carboxylesterase in populationⅠ and populationⅤ was studied. And the inhibition effects of 4 insecticides (chlorpyrifos, triazophos, methomyl and omethoate) to CarE in different populations were determined. The results showed that Aphis sp. had resistance to bifenthrin in different levels compared with the sensitive populationⅠ of Aphis sp.. LC50 of the sensitive population Ⅰ was 0.057 mg/L, and it was 4.344 mg/L in the case of population Ⅴ. The resistance of populationⅤ to bifenthrin was 76.2-fold to that of the sensitive population,which could be classified as high level resistance. The activity of CarE increased with the increasing of resistance levels. There was no significant different in Km between sensitive population Ⅰ and high resistant populationⅤ. However, the Vmax of resistant populationⅤ was 2.08-fold compared with the sensitive population Ⅰ. Inhibition effects of 4 insecticides to CarE of different populations were different, and I50 increased with the increasing of resistance level to bifenthrin. Carboxylesterase plays an important role in the resistance of Aphis sp. to bifenthrin.
Key words:insecticides  Aphis sp.  bifenthrin  carboxylesterase  resistance  inhibition effect
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