Abundance of the Parasitoid Complex Associated with Liriomyza spp. (Diptera : Agromyzidae) on Vegetable Crops in Central and Southern Vietnam

Field survey was conducted in 45 major vegetable growing municipalities in 20 provinces of five regions of central and southern Vietnam during November 2003- July 2004 with the aim of recording parasitoid species associating with Liliomyza leafminers and their relative abundance on vegetable crops. Sampling of leafminer-infested leaves from 14 vegetable crops yielded 18 species of hymenopteran parasitoids. Among them, Neochrysocharis beasleyi, N. okazakii, N. firmosa and Asecodes delucchii were abundant species. The most abundant parasitoid species reared from the leafminers on tomato and yard-long bean was N.beasleyi. This species was the second most abundant on French bean. Neochrysocharis formosa was the most abundant on yard- long bean, tomato and onion. Hemiptarsenus varicornis existed on every host plant, and the second most major species on casaba melon. The results suggest the importance of different species of parasitoids in vegetable integrated pest management