对药剂敏感性不同的烟蚜体内几种关键性酶活性的比较分析

A comparative study of the activity of three key enzymes of Myzus persicae(Sulzer) in different tobacco production areas

对吡虫啉和氧化乐果在三明地区和合肥地区烟蚜的毒力进行了测定,并对两地烟蚜的羧酸酯酶、乙酰胆碱酯酶和谷胱甘肽转移酶的活性进行了研究。结果表明吡虫啉对两地烟蚜的生物活性远高于氧化乐果,三明烟蚜对两种药剂的敏感性都比合肥烟蚜的低,三明烟蚜种群的毒力方程b值低,存在一定的异质性;两地烟蚜的羧酸酯酶、乙酰胆碱酯酶活性差异不显著,但三明地区烟蚜的谷胱甘肽转移酶活性显著高于合肥地区烟蚜。

The toxicity of imidacloprid and omethoate to Myzus persicae in Sanming region and Hefei region was measured. Also studied was the bioactivity of carboxyl esterase （CarE）, acetylcholinesterase （AchE）, and glutathione - transferase （GSTs） from the Myzus persicae in the above two regions. Results of bioassay revealed that the bioactivity of imidacloprid to Myzus persicae is higher than that of omethoate in both regions, and the susceptibility of Myzus persicae in Sanming region is lower than that of Myzus persicae in Hefei region. The toxicity equation of Myzus persicae population in Sanming region showed that the value of b was low and the Myzus persicae population presented heterogeneity. The difference between the activity of CarE and that of AchE was not notable, but the activity of GSTs of Myzus persicae in Sanming region was obviously higher than that of Myzus persicae in Hefei region.