배(Pyrus pyrifolia N.) 개화기의 기상조건에 따른 꿀벌(Apis mellifera L.)과 서양뒤영벌(Bombus terrestris L.)의 화분매개활동 특성

We investigated pollination and foraging activities of honeybee (Apis mellifera L.) and bumblebee (Bombus terrestris L.) during flowering season of the asian pear (Pyrus pyrifolia N.) under different weather conditions. There was no significant statistical difference about the pollination activities of two species. However, the pollination activities of bumblebee were more active than those of honeybee under low temperature and rainfall period. The activities of honeybee and bumblebee were more influenced by temperature than other factors (i.e. illumination and wind velocity). Honeybee was more sensitive to temperature and illumination than bumblebee. At low temperatures (＜20℃) on cloudy days (＜30,000 lux) with a certain wind velocity (＞4.0 ㎧), the pollination activity of the honeybee was lower twice than that of bumblebee. Therefore, the results from this study suggest that there was different foraging activity properties between honeybee and bumblebee, and bumblebee was more effective for pear pollination than honeybee under low temperature and bad weather during pear blossoming season.