Efficacy of nine insecticides against adults of citrus psyllid, Diaphorina citri Kuw.

In order to screen the effective insecticides on controlling the adults of citrus psyllid,the adult psyllids were raised on Murraya paniculata and bagged with plastic netting bags of 40 mesh,and nine insecticides were sprayed individually or in combination.The results showed that the control efficacy of 48% chlorpyrifos EC 480 mg / L,10% imidacloprid WP 100 mg/L,25% imidacloprid WP 250 mg/L,20% fenpropathrin EC 200 mg/L,20% imidacloprid plus isoprocarb EC 200 mg / L,20% carbosulfan EC 200 mg / L,and 2.5% cyhalothrin EC 25 mg / L was from 97.1% to 100% in 24 hours after sprayed on citrus psyllid,respectively,and they could be used singly in production.The control efficacy of the mixture of 20% isoprocarb EC and 25% imidacloprid WP 480 mg / L was 100.0% in 24 hours after sprayed and better than that of single use,which indicated that reasonable mixed-use of insecticides could improve the control efficacy on citrus psyllid.