Longo, S., Russo, A., & Siscaro, G. 1989 Rilievi bio-etologici su Quadraspidiotus perniciosus (Homoptera: Diaspididae) in pescheti della Sicilia orientale. [Bio-ethological observations on Quadraspidiotus perniciosus (Homoptera: Diaspididae) in Eastern Sicily peach orchards.]. Tecnica Agricola 41(3): 3-11.

Notes: Abstract: Biology; discussion of natural enemies, Encarsia perniciosi and Aphytis proclia. Keywords: biology/biological control.