Chen, Y.G., & Hu, D.X. 1998 [Interspecific interaction between Hemiberlesia pitysophila Takagi (Homoptera: Diaspididae) and its parasite Coccobius azumai Tachikawa (Hymenoptera: Aphelinidae).]. Natural Enemies of Insects 20: 136-142.

Notes: A set of differential equations was established to describe the interaction between Hemiberlesia pitysophila and Coccobius azumai based on population data from the field in Huidong and Gaoming, Guangdong, China, during 1993-95. The pest and parasitoid were found to coexist, under low population densities, characterized by a long parasitoid-releasing period.