Moursi Khadiga, S., & Hegazi, E.M. 1983 The olive-tree scale, Leucaspis riccae Targ. (Hom.: Diaspididae) as a key pest of olive trees in dry farm system in the Egyptian western desert.. Bollettino del Laboratorio di Entomologia Agraria 'Filippo Silvestri'. Portici 40: 119-124.

Notes: Damage; monthly variation in infestation; influence of weather; reistant varieties; biology; natural enemy.