Pesticide Susceptibility of Q-biotype Bemisia tabaci (Hemiptera: Aleyrodidae)

Abstract

The pesticide susceptibility of Q-biotype Bemisia tabaci on cabbage leaves was evaluated at 25%deg;C under a 15L9D photoperiod. Susceptibility to the tested pesticides varied among the developmental stages of the whitefly. Among the 42 pesticides tested on third stadium larvae using the leaf dipping method, fenpyroximate and buprofezin, fenpyroximate, milbemectin, pyridaben, lepimectin, spinetoram, and spinosad were more toxic. LC₅₀ values of milbemectin, pyridaben, lepimectin, spinetoram, and spinosad were 0.98, 1.59, 0.08, 0.04, and 0.91 ppm, respectively. Among the 40 pesticides tested on adult whiteflies using the leaf dipping method, pirimiphosmethyl, thiocyclam, pyridaben, and spinetoram caused high mortality. The application of cartap, thiocyclam, dinotefuran, nitenpyram, pyrifluquinazon, and spinetoram reduced the number of eggs oviposited by female adults of the whitefly on the leaves. Only pyridaben significantly affected the egg mortality of the whitefly.