Abstract
The functions of juvenile hormone in the physiological and behavioral maturation in Apis mellifera males (drones) were investigated by application of a juvenile hormone analog, methoprene. No evidence was found for the stimulation of maturation of male reproductive organs by methoprene. The dry weight of the seminal vesicle and reproductive accessory gland was slightly but significantly lighter in drones treated with a high dose (100 or 500 μg/male) of methoprene than drones treated either with a low dose (1 or 10 μg/male) or solvent control only. Methoprene accelerated in-colony male movement from the center to the periphery. It also induced earlier diet transition from pollen and jelly-like materials to honey. These results suggest that juvenile hormone acts as a behavioral pacemaker rather than as a gonadotropin in drones.
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