Susceptibility of two species of ladybird beetle adults, Chilocorus kuwanae Silvestri and Pseudoscymnus hareja (Weise) in tea fields to several insecticides

Abstract

We revealed the toxicity of several insecticides on the adults of two species of ladybird beetles, Chilocorus kuwanae Silvestri and Pseudoscymnus hareja (Weise), predators of white peach scale Pseudaulacaspis pentagona (Targioni) in tea fields using a contacting method with tea branches. The results of test with C. kuwanae showed that chlorantraniliprole, cyantraniliprole, spinetoram and tolfenpyrad were not harmful, silafluofen was slightly harmful, and diafenthiuron and fluxametamide were seriously harmful. The results of test with P. hareja showed that chlorantraniliprole, cyantraniliprole, diafenthiuron, spinetoram and tolfenpyrad were not harmful, abamectin, dinotefuran and pyrifluquinazon were slightly harmful, fluxametamide was seriously harmful.