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Scale insects, whiteflies and psyllids (Hemiptera) are the main olive pests in Egypt. The aim of this work is to study the incidence of scale insects, whiteflies and psyllids and their natural enemies on olive trees in different locations in Egypt during 2009-2010. The results of the present work indicated that the seasonal abundance of Lucaspis riccae Targioni-Tozzetti (Hemiptera: Diaspididae) on olive trees reached maximum during November and February in first and second years, respectively. Percent parasitism by Aphytis libanicus Traboulsi (Hymenoptera: Aphelinidae) reached maximum during December with percent parasitism 11.1 and 12.2 %, during the two years under considerations, respectively. The insect population of Parlatoria oleae Leonardi (Hemiptera: Diaspididae) reached maximum during October, 20092010. Percent parasitism by Aphytis lingnanensis Compere (Hymenoptera: Aphelinidae) and Habrolepis aspidioti Compere and Annecke (Hymenoptera: Encyrtidae) reached maximum during December and November with percent parasitism 6.5 and 12.5 in the first year, respectively and in November in the second year with percent parasitism 6.9 and 14.2 %, respectively. The predator Chilocorus bipustulatus L. (Coleoptera: Coccinellidae) reached maximum during February and March in the first and second years, respectively. In this work the abundance of Saissetia coffeae (Walker) (Hemiptera: Coccidae) reached maximum during October in the first and second years. Percent parasitism by Metaphycus flavus (Howard) (Hymenoptera: Encyrtidae) reached maximum during October and September with parasitism rates 11.5 and 13.5 % during the first and second years, respectively. The predator Scymnus syriacus (Marseul) (Coleoptera: Coccinellidae) reached maximum during October in the first and second years. The populations of Saissetia oleae (Bernard) (Hemiptera: Coccidae) reached maximum during October in the first and second years. Percent parasitism of Metaphycus lounsburyi (Howard) (Hymenoptera: Encyrtidae) reached maximum during October during the first and second years, with percent parasitism 34.2.1and 40.1 % respectively. The predator Exochomus flavipes (Thunberg) (Coleoptera: Coccinellidae) reached maximum during October in the first and second years. The seasonal abundance of Aleurolobus olivinus Silvestri (Hemiptera: Aleyrodidae) reached maximum during April in first and second years. Percent parasitism by Encarsia olivina (Masi) (Hymenoptera: Aphelinidae) reached maximum during April during the first and second years with percent parasitism 0.6 and 0.5, respectively. The abundance of Siphoninus phillyreae (Haliday) (Hemiptera: Aleyrodidae) reached maximum during October in first and second years, respectively. Percent parasitism by Encarsia inaron (Walker), (Hymenoptera: Aphelinidae) reached maximum during October in first and second years with percent parasitism 1.8 and 2.9%, respectively. The results of the present study indicated that the seasonal abundance of Euphyllura straminae Loginova (Hemiptera: Psyllidae) reached maximum during March in the first and second years. The predator Orius sp. reached maximum during March in the first and second years.

Seasonal incidence of scale insects, whiteflies and psyllids (Hemiptera) of olive and their natural enemies in Egypt