不同地区烟蚜对药剂的反应及其羧酸酯酶活性

Susceptibility to Pesticides and Carboxylesterase Activity of Myzus persicae (Sulzer) in Different Areas

测定了吡虫啉和氧化乐果对福建三明和安徽合肥地区烟蚜的毒力,并研究了两地烟蚜的羧酸酯酶活力、米氏常数和最大反应速度。结果表明:吡虫啉对两个地区烟蚜的生物活性远高于氧化乐果,三明地区烟蚜对两种药剂的敏感性均低于合肥地区的烟蚜,种群毒力方程的b值也低于合肥烟蚜,烟蚜存在一定的异质性。两地烟蚜的羧酸酯酶活性、米氏常数和最大反应速度差异不显著。

The virulence of omethoate and imidacloprid to the Myzus persicae （Sulzer） in Sanming and Hefei was determined, and the carboxylesterase activity, Michaelis constant and maximum response velocity of the Myzus persicae （Sulzer） were also studied. The results showed that the bioactivity of imidacloprid to Myzus persicae （Sulzer） was by far higher than that of omethoate both in Sanming and in Hefei; the susceptibility of Myzus persicae （Sulzer） in Sanming to these pesticides lower than that in Hefei; the b value of virulence equation of Myzus persicae （Sulzer） population in Sanming lower than that in Hefei, suggested the existence of some heterogeneity. The carboxylesterase activity, Michaelis constant and maximum response velocity of Myzus persicae （Sulzer） in the two areas were not significantly different.