Liotta, G., & Maniglia, G. 1974 [Estimate of the effectiveness of the pesticides generally utilized in Sicily against Aspidiotus hederae (Vall.) (Hom. Diaspididae).. Bollettino dell' Istituto di Entomologia Agraria e dell' Osservatorio di Fitopatologia. Palermo 9: 207-213.

Notes: [Original title: Valutazione dell'efficacia dei fitofarmaci comunemente adoperati contro Aspidiotus hederae (Vall.) (Hom.-Diaspididae) in Sicilia.] Mineral oil at 2.5% showed satisfactory control against all stages of the insect and proved statistically not different from parathion used alone or mixed with oil. Therefore, the use of parathion in the control of the scale is not justified.