Experiments on Control of Myzus persica (Sulzer) with 5% Imidacloprid EC

For recommending more effective pesticide to control Myzus persica(Sulzer) ,the field contrast experiments of imidacloprid EC used in different levels were conducted in 2003 and 2004. The results showed that the relative control effects of imidacloprid EC at different dilutions of 1000,1200 and 1400 were over 99% in the first and second day after application, which were not significant differences, that the relative control effects of omethoate EC at a dilution of 1000 were less than 70%, which were significant different from imidacloprid EC;and that the relative control effects of imidacloprid EC were 100% approximately in the seventh day after application, which of omethoate EC reduced significantly.