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Abstract An experiment was carried out in the apiary of the faculty of agriculture,Minia university during 1989/90 and 1990/91 years to study the following points: 1- factors affecting royal jelly production. I. honeybee race. II. artificial feeding of honeybee colonies. III. seasonal effect on royal jelly production. 2- chemical composition of royal jelly. 3- hypopharyngeal glands development. |