Mourad, A.K., & Zanuncio, J.C. 1998 Population dynamics of Parlatoria blanchardi (Targ.) (Homoptera: Diaspididae) on two date palm varieties in Egypt.. Mededelingen Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen Universiteit Gent 63: 2a, 389-395.

Notes: The seasonal abundance of the scale insect, P. blanchardii, attacking date trees (Zaghloul and Semmany varieties) in the El-Beheira Governorate (at two sites, Idko and Rashid) in Egypt, was studied. For each 10-year-old tree, 10 leaflets were sampled with samples taken once monthly. The pre-adult stages and adults were surveyed between September 1994 and August 1995. Monthly infestation rates by P. blanchardii on leaflets were recorded. Leaves of Zaghloul and Semmany at Idko were more susceptible to P. blanchardii infestation. The scale preferred the upper surface of leaves and there were four generations per year at both sites. It is concluded that parasitization by Aphytis sp. has an important role in regulating the population dynamics of P. blanchardii.