Ortu, S., & Acciaro, M. 1999 Osservazioni preliminari sull'impiego delle somme termiche di sviluppo per il controllo di Aonidiella aurantii (Maskell) in Sardegna.. Frustula Entomologica, Pisa (N.S.) 22(35): 127-131.

Notes: Title in English: [Preliminary observations on the use of developmental degree-day accumulation for the control of Aonidiella aurantii (Maskell) in Sardinia.] From the Proceedings, conference on numerical, statistical and information methods in crop and forest protection, Sassari, Italy May 1999.] In order to develop a phenological model for the control of Aonidiella aurantii (Maskell), preliminary studies were conducted on the scale biology in relation to the degree-day accumulation required for the development of its various life-stages in a citrus grove located in Oristano, Italy.