Bombiculture Domestication of bumble bees for commercial propagation.

Brood The eggs, larvae, and pupae within a honey bee or bumble bee colony. Immature honey bees live in the central portion of older darkened combs; pollen and honey are stored at the periphery of the brood area.

Bulbil Asexual bulb-shaped reproductive unit of agaves and other plants. Bulbils are produced on flowering stalks if pollinators fail to visit flowers; they are not produced by fertilization. Seeds are not produced and before the death of the semelparous plant, clonal, tiny agaves grow from the unfertilized flowers.

Bumble bee Bee of the genus Bombus, widely distributed throughout North America and some other continents. Bumble bees are social and have annual colonies; some species are managed commercially for greenhouse pollination, especially of tomatoes.

Buzz pollination The process by which a pollinator—usually bumble bee or a solitary bee, but not a honey bee—attaches itself to a flower and vibrates its flight muscles. The pollinator’s movement causes pollen to be dislodged from the anther.

Carpenter bee Large solitary bee that lays eggs in tunnels bored into wood or plant stems.

Colony Social insects including honey bees organized by caste (sterile female workers, male drones, a queen mother). The bee colony has been labeled a superorganism, and it can have as many as 60,000 individuals at its peak. The colony lives in a hive or nest. Bumble bee colonies are annual and much smaller (fewer than 30 bees at high altitudes) than are honey bee colonies.

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