Outin, G. 1950 Le pou de San José (Quadraspidiotus perniciosus Comst.) en allemagne occidentale. [The San José scale (Quadraspidiotus perniciosus Comst.) in West Germany.]. Revue de Pathologie Végétale et d'Entomologie Agricole de France 29(1-2): 10-16.

Notes: Distribution, hosts and chemical control are discussed for this pest species.