Evaluation on the effects of 13 insectcides on controlling Bemisia tabaci

13 kinds of insecticides were used in a efficacy screening experiment against the experimental population of Bemisia tabaci (Gennadius) on Brassica alboglabra Bailey in Guangzhou. The results showed that the Pyridaben (20%EC) and the spirotetramat (24%SC) had good effect，and could be used in the further test. But other 11 kinds of insecticides were not so ettctive in controlling the experimental population of B.tabaci.