CAB International, 1986 Quadraspidiotus perniciosus (Comstock).. Distribution Maps of Pests, Series A, Agricultural Map no. 7 (rev.): 3 pp.

Notes: Published in the U.K. by the International Institute of Entomology, an agency of CAB International; Abstract: Map showing distribution of this sp. worldwide; countries listed with references to records; also called San Jose scale, California scale; polyphagous; host plants include most deciduous fruits (trees and shrubs).