Control Effect of Four Insecticides on Sitobium avenae in Wheat Field

【Objective and Method】The aim of present study was conducted to find out the insecticides with new-type high performance and better control efficiency then its reasonable dosage were applied in field experiments: 20% acetamiprid WP,25% pymetrozine SC,10% nitenpyram AS and 5% imidacloprid WP by spray.【Result】It showed that all the four insecticides were safe and had no medicine harm to wheat.After seven days,the control effect of 22.5,30 and 45 g a.i./hm2 of 20% acetamiprid WP correspond with 5% imidacloprid WP,reached 96.15%,99.76% and 99.39% after seven days,the effect of 60,90 and 120g a.i./hm2 of 25% pymetrozine SC was higher than 5% imidacloprid WP,reached 96.26%、97.83% and 95.35%,the effect of 22.5,30 and 45 g a.i./hm2 of 10% nitenpyram AS was significantly lower than 5% imidacloprid WP,its effect reached 62.50%,48.07% and 79.51%.【Conclusion】Proper amount of 20% acetamiprid WP was 22.5-30 g a.i./hm2,25% pymetrozine SC was 60-90 g a.i./hm2,5% imidacloprid WP was 22.5g a.i./hm2.