Tests of Several Chemical on the Control of Scythropus yasumatsui

The control effects of three biological pesticides on Scythropus yasumatsui were investigated: 0.26% aqeous matrine,1.8% abamectin EC,0.3% azadirachtin and 2.5% of high-performance polyester closantel EC.The results showed that except for referencing pesticide(2.5% of high-performance polyester closantel EC),0.26% aqeous matrine and 0.3% azadirachtin had better effects to control S.yasumatsui,1.8% abamectin EC had better lasting effect.In field efficacy experiments,the control efficiency was still 73.08% three days after using abamectin EC,which exhibited better antifeeding effect on S.yasumatsui,indicating that abamectin EC can be used in large area in production.