comparison studies between the hybrid races of carniolean and italian honeybee to resistance of the foulbroods

This work was performed during the period from May 2011 to May 2012, the times of increase and decrease of the infection strength with American and European foulbrood diseases in certain hybrid honeybee colonies Apis mellifera (L.) (Hymenoptera: Apidae) were studied at Menoufia governorate, generally, it was appeared that American foulbrood (AFB) existing throughout the year by varied levels while European foulbrood (EFB) is viewed at short and defined periods, other hand, the hybrid Carniolean honeybee race was found more tolerance to infection with the foulbrood diseases than the hybrid Italian honeybee race in the Egyptian environment.