| Abstract: In order to screen a new insecticide for the control of Bemisia tabaci , field efficacy trials were carried out to determine the efficacy of dinotefuran and piperidine against Bemisia tabaci and screen the appropriate insecticides and their effective concentrations, taking benevir as control. The results showed that among the three insecticides, the 1 500 times of dinotefuran had best control effect on Bemisia tabaci , which had the characteristics of quick effect, holding efficiency, long duration and stability. The second was 1 500 times of benevir, whose prevention effect was more than 80% in the whole treatment process, and it had good control effect on Bemisia tabaci . The efficacy of 1 000 times, 1 500 times and 2 000 times of piperidine against Bemisia tabaci were poor. In the selection of control insecticides, benevir and furosemide could be used alternately to prevent benevir from accelerating the development of drug resistance. Piperidine was not recommended to be used as a drug for the control of Bemisia tabaci . |