الفهرس 
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Abstract
An experiment was conducted in 2011-2012 to study the foraging activity and impact of honeybees Apis mellifera L. and wild bees Colletes lacunatus Dours on seed production of broccoli under field conditions of Ismailia Governorate. Randomized Complete block design (RCBD) was used with four replications and six treatments. In this research, two cultivars sultan and marathon, two planting dates and two types of inflorescences (primary and secondary) were used. Results revealed that both Apis mellifera and Colletes lacunatus significantly increased the pollination percentage and significant differences between all treatments were also observed. This study demonstrated that bee pollination could significantly improve both the yield and the 100 seed weight in broccoli under Ismailia conditions.