Abstract: The aim is to provide a scientific evidence for controlling white-backed planthopper in field. The sensitivity of the third instar nymph of white-backed planthopper population in Anren, Hunan to five pesticides was determined by rice stem impregnation method. The results showed the sensitivity (LC50) of the tested population to Thiamethoxam, Buprofezin, Imidacloprid, Nitenpyram and Isoprocarb was 0.0299, 0.1214, 0.1322, 0.3296 and 26.7068 mg/L, respectively. Based on the determination of sensitivity, the five pesticides tested could be alternately used to control white-backed planthopper in field, in order to avoid or delay the reduction of sensitivity to pestcides.