Effects of Pesticides on Adults of Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae), an Egg Parasitoid of the Tea Tortrix

Abstract

The effects of 27 insecticides, 7 acaricides, and 9 fungicides on Trichogramma dendrolimi were investigated using dry-film methods. The results suggested that non-selective pesticides, such as organophosphates or synthetic pyrethroid insecticides, and insecticides against pests that infest new shoots were harmful to adult females of T. dendrolimi. In contrast, most insect growth regulating (IGR) insecticides, acaricides, and fungicides were either harmless or only slightly harmful to adult females of T. dendrolimi.