Ugolini, A. 1979 Supervised control in apple orchards in Piedmont.. Proceedings: Internationales Symposium der IOBC/WPRS über Integrierten Pflanzenschutz in der Landund Forstwirtschaft. OILB/SROP Wien, Austria 648 pp.

Notes: [Book title in English: Proceedings: Iternational Symposium of IOBC/WPRS on Integrated Control in Agriculture and Forestry.] Quadraspidiotus perniciosus was mentioned as one of the species found in apple orchards.