In Egypt, Macrotomapalmata F. (Coleoptera: Cerambycidae) is a serious polyphagous pest attacking fruit, wood and ornamental trees. Apricot orchards, however, are liable to severe infestation especially in dense plantations. Hosts and degree of infestation in Matrouh, Alexandria, Fayoum and North Sinai were recorded. The seasonal fluctuation in population was monitored on apricot trees at Alexandria and Giza governorates throughout the 3 successive years (1987)(1988)(1989). M. palmata started to emerge during June and continued until October. At both the experimental sites, M. palmata development was influenced by temperature and relative humidity. Resume-En Egypte, Macrotoma palmata F. (Coleoptere: Cerambycidae) est un ravageur polyphage qui attaque gravement les arbres fruitiers, les boisements et les arbres ornementaux. II a ete toutefois souligne que les abricotiers etaient disposes a une severe infestation surtout en cas, de culture dense. Les notes et le degre d'infestation dans chaque gouvernorat etaient enregistres. La fluctuation saisonniere de la population etait controlee sur les abricotiers du gouvernorat d'Alexandrie et celui de Giza pendant les 3 annees successives : 1987-1989. L'emergence des scarabees a debute au cours du mois de Juin et a continue jusau'au mois d'Octobre. L'infestation a augmente plus de 3 fois au cours de deus ans. L'emergence du scarabee a ete affectee par la temperature et per l'humidite relative a 0,5-1 et 2,5-4,5 mois avant l'emergence a Alexandrie et a Giza respectivement. L'application des insecticides pour la lutte contre le Af. palmata sur l'abricot doit commencer vers fin Juin ou debut Juillet.

The seasonal abundance of Enneadesmus obtusedentatus Lesne (Col.: Bostrichidae) was studied on fig trees near Alexandria during 3 years, 1987, 1988 and 1989. Beetles started to emerge from late February/early March until late November/early December. About three broods per year were recorded. Infestation increased by almost three times throughout 2 years. Beetle emergence was positively related to temperature and negatively to relative humidity.

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