茶園に生息するヒメアカホシテントウに対する各種農薬の影響

抄録

We tested the toxicity of 11 pesticides on the ladybird beetle Chilocorus kuwanae Silvestri, a predator of the white peach scale Pseudaulacaspis pentagona (Targioni) in tea fields by a contact method using tea branches. The organophosphate insecticide-methidathion was seriously harmful to the larvae and moderately harmful to the adults, the neonicotinoid insecticide-dinotefuran, pyrethroids insectiside-bifenthrin, and diafenthiuron were moderately harmful to the larvae. Cyantraniliprole, spinetoram, pyflubumide, fenpyroximatebuprofezin mixer, flufenoxuron and tolfenpyrad were not harmful to the larvae, although flufenoxuron might affect the emergence. Fenpyroximate-buprofezin mixer and pyrifluquinazon were not harmful to the adults.