Parasitoids of Insect Pests Feeding on (Goodeniaceae) from Yongxing Island in South China Sea.

(Goodeniaceae) is an important evergreen coastal plant on islands in the South China Sea, which shows excellent tolerance for salty and drought conditions. Nevertheless, the growth of populations on these islands in the South China Sea has been threatened by a few serious insect pests. However, we know little about the biology of these pests. In this study, we surveyed and identified the parasitoids of two main pests ( (Swinhoe, 1901) and Shiao and Wu, 1996) of communities on Yongxing Island in the South China Sea, with the aim to assess their potential in biological control. (Ashmead, 1904) is a gregarious endoparasitoid of the larva of and contributes an average 48.9% parasitism rate on . Fischer, 1960 and (Zetterstedt, 1838) are both solitary endoparasitoids of the larva of , with a respective 5.8% and 64.4% parasitism rate on . We summarize the species diagnosis, biology, and distribution of the three parasitoid species. The potential of these parasitoids used in biological control is also discussed.