To investigate the effectiveness of ventilation in bumblebee colony, we ventilated bumblebee(bombus terrestris) colonies using PC cooling fan to replace the fanning behavior of bumblebees, unventilated colonies were used as controls. The temperature of the colonies that were ventilated using the cooler fan was 3 ℃ lower than the control colonies, and the rate of fanning behavior were 9 times lower in ventilated colonies than in the control colonies. Foraging activity and survival rates of worker bees in ventilated colonies doubled compared to the control colonies. Rates of seed set per flower and number of seeds set by bees in the ventilated colonies was 12 % and –15 % and 1.1 and –1.4 times higher pollination, respectively, than for the control colonies. We conclude that installing a ventilation device on the colony box can improve the internal environment of bumblebee colonies at high temperatures through ventilation and that this is a good option to increase pollination effectiveness for the crops in high temperature greenhouse conditions.

• Kyeong Yong Lee(Department of Agricultural Biology, The National Institute of Agricultural Science)
• Hyeonjin Ko(Department of Agricultural Biology, The National Institute of Agricultural Science)
• Hyung Joo Yoon(Department of Agricultural Biology, The National Institute of Agricultural Science)