Xie, Y.P., Zhao, S.L., & Tang, X.Y. 2004 [Investigation on the parasitoids of Phenacoccus azaleae in Chinese prickly-ash.]. Forest Pest and Disease No. 5: 28-31.

Notes: Phenacoccus azaleae Kuwana is a destructive pest attacking Chinese prickly ash northern China. Its parasitoids are Anagyrus schoenherri, Syrphophagus aphidivorus, Pachyneuron, sp., Eunotus sp., and Gastrancistrus sp. Anagyrus schoenherri was the dominant species. It has two generations a year and the adult wasps appear in April and June respectively. It parasitizes on the nymph, adult and egg of the pest. In a pure Chinese prickly ash forst its parasitic action is 8.7%, due to a dense population of the mealybug. In contrast, in the mixed forest of Chinese prickly ash and crops the parasitic action is only 0.56%, considering pesticide spray. Meanwhile, a higher parasitic action was found on other mealybug species, such as Phenacoccus fraxinus and P. pergandei by Anagyrus schoenheri. Therefore, a biological control method was suggested which was artificially collecting wasps from where pests previously occurred and releasing to sites of new occurrence.