not in Young The survey of the insect fauna associated with onion seedbeds and fields during 2002/2003 revealed 32 species belonging to 27 families and 11 orders. Among these species 22 were pests belonging to 20 families and 6 orders, 8 were predators belonging to 5 families and 4 orders and 2 were parasites belonging to the family Braconidae from order Hymenoptera. Insects associated with stored onion bulbs during 2003 storage season were 13 species belonging to 11 families and 5 orders among which 10 were pests belonging to 7 families and 3 orders, 2 were predators belonging to 2 families and 2 orders and only I parasite species belonging to the family Chalcididae, order Hymenoptera. Insect species are systematically listed in tables showing their existing stage(s), frequency and period of occurrence. The most destructive and commonly occurring insect pest in onion seedbeds and fields was the onion thrips Thrips tabaci Lindeman (Thysanoptera : Thripidae) which prevailed from Octobe! r till May. The larvae of the onion bulb fly Eumerus amoenus Loew. (Diptera: Syrphidae) were the most serious pest threatening stored onion bulbs throughout the storage period that extended from early June until early November. Insecta (Arthropoda). Insecta: Community structure, Cultivated land habitat, Onion seedbeds and fields, Egypt, Assiut Governorate. Arthropods; Insects; Invertebrates. none2008checked