The experiment was conducted to estimate the influences of Abamectin, imidacloprid, buprofezin and dimethoate on Bemisia tabaci. The result showed that the imidacloprid was the most effective and its interference index of population control (IIPC) was (0.047 2), i.e. the population of B. tabaci in the imidacloprid-used area was 4.72% of the population in control, the next are abamectin and buprofezin, their IIPC are (0.101 9) and (0.155 1), respectively. The IIPC of the population of B. tabaci in dimethoate area was (1.076 2), this means the population of B. tabaci in the dimethoate application block was (1.076 2) times of that of the control.