抄録
The effects of several insecticides on the emergence of the parasitoid, Encarsia smithi (Silvestri) parasitizing the tea spiny whitefly Aleurocanthus camelliae Kanmiya & Kasai were evaluated by both laboratory and field experiments. Tea leaves with the pupae of A. camelliae parasitized by E. smithi were collected from a tea field and these leaves were dipped in 13 insecticides diluted with water to ordinary use concentration, and the emergence rate of the parasitoid was checked one month after the treatments in the laboratory experiment. In the field experiment, the emergence rate of the parasitoids was checked 70 days after the application of 13 insecticides in a tea field. The results of these experiments showed that machine oils (two dilutions), methidathion, profenofos and tolfenpyrad were seriously harmful; clothianidin, spinetoram, fenpyroximate·bupurofezin mixer, and methomyl were slightly harmful; and spiromesifen, chlorfenapyr, pyrifluquinazon and diafenthiuron were harmless on the emergence of E. smithi.
