マルハナバチ一斉調査(第六報)

抄録

Flower visitations by both native and exotic bumblebee species were investigated at 21 monitoring sites in various regions of Japan in the spring and summer of 2002. The investigation was part of a long-term program that has been in progress since 1997 to monitor the invasion of an alien bumblebee, Bombus terrestris L. (Hymenoptera: Apidae). Flower visitation by B. terrestris was ascertained at two monitoring sites, one in Shizuoka and one in Hokkaido, where a large number of colonies of this species have been commercially introduced for agricultural pollination.