Borges da Silva, E., & Mexia, A.M.M. 1996 The damage caused by Planococcus citri Risso on citrus groves.. Proceedings. XX International Congress of Entomology: held in Firenze, Italy, August 25-31, 1996. 820 pp.

Notes: The citrus mealybug, P. citri, is usually considered a key pest of citrus groves in several countries, including Portugal, due to damage caused by this species.