Effects of insecticides on the adults of Q-biotype Bemisia tabaci in Mie Prefecture

Abstract

Bemisia tabaci (Gennadius) is an important pest in protected tomato horticulture in Mie Prefecture. Strategies for the management of this pest largely depend on the application of insecticides. We used the kidney bean leaf-dipping method to examine the insecticide susceptibility of adult Q-biotype B. tabaci individuals collected from tomato-growing districts in Mie Prefecture. Emamectin benzoate, lepimectin, pyrifluquinazon, and cyantraniliprole showed high levels of insecticidal activity, whereas dinotefuran, nitenpyram, sulfoxaflor, and spinetoram showed low activity levels. In 2013, dinotefuran, nitenpyram, and spinetoram showed high insecticidal activity levels against adults of the Q-biotype B. tabaci, and the activity of these insecticides in 2020 and 2021 was significantly lower than that in 2013.