Abstract
Survey and population density of the olive bark borer, Phloeotribus scarabaeoides (Bern.) (Coleoptera: Scolytidae), and its associated parasitoids were carried out at Fayoum Governorate, Egypt during the two successive years 2008 and 2009. Six species of hymenopterous parasitoids were recorded i.e. Cheiropachus quadrum L. Eurytoma morio Bohemen. Raphitelus maculates Walker. Cerocephala cornigera Westw., Cephalonomia sp. and Dendrosoter protuberans Ness. D. protuberans was recorded or the first time on P. scarabaeoidesn in Egypt. P. scarabaeoides had two peaks in 2008 and 2009 while the parasitoids had one peak in 2008 and 2 peaks in 2009. C. quadrum was the dominant parasitoid in both seasons, with a relative density of 75.8 and 39.7. respectively. In 2008, percentage or parasitism ranged between 0.2 and 52.9%, while in 2009 it ranged between 0.07 and 29.9%. Highest percentages of parasitism (52.9% and 29.9%) were recorded in January 2008 and February 2009, respectively.