Bloesch, B., & Stäubli, A. 1992 Le pou de San Jose, Quadraspidiotus perniciosus Comst. (Homoptera, Coccidea). [The San Jose scale, Quadraspidiotus perniciosus Comst. (Homoptera, Coccoidea). Biology and trapping technique using sex pheromones.]. Revue Suisse de Viticulture, d'Arboriculture et d'horticulture 24(5): 305-310.

Notes: Summary/abstract in: English and German. Abstract: History of infestations of this species in Switzerland; recorded and quarantined here since 1950's; recently a new outbreak has occurred; map of distribution revealed by trapping. Keywords: pheromones; biology.