Geographic distribution of Platygaster robiniae (Hymenoptera: Platygastridae) parasitizing an invasive insect pest Obolodiplosis robiniae (Diptera: Cecidomyiidae) in China.
Platygaster robiniae Buhl and Duso (Hymenoptera: Platygastridae) is an important and specialized natural enemy of the black locust gall midge Obolodiplosis robiniae (Diptera: Cecidomyiidae), an invasive insect pest in China. It is an egg-larvae parasitoid of the gall midge and plays a significant role in natural control of O. robiniae. To figure out the geographic distribution of P. robiniae and the relationship between the parasitoid and its host in China, field surveys were conducted in 29 sites of 17 provinces, cities and autonomous regions in China within the distribution range of its host O. robiniae. The results showed that P. robiniae was found in all areas where its host distributed. Based on the collection data, P. robiniae were found broadly distributed in the range of 26°35.451′-43°53.482′N, 103°51.816′-125°15.969′E at the elevation in between 4-1 097 m in China.