The best way to get rid of bumblebees is to relocate the nest. Killing the bees, which are integral to crop pollination, is illegal in many areas.
Bumblebee nests usually contain about 50 bees. The nest should be moved at night, when the bees do not fly. Once the bees become quiet after dark, a wooden box, such as a bird's nest box, should be placed over the bee nest. All holes should be sealed with tape or stuffed with a flexible material to prevent the bees from coming out. The box should be moved to a point that is at least 5 feet above ground, at which point the holes should be reopened.