Befriending Bumble Bees cover

Befriending Bumble Bees

Elaine Evans, Ian Burns, and Marla Spivak

Copyright ©  2007  Regents of the University of Minnesota. All rights reserved.

2008 Best Notable Government Documents winner, nominated by Government Document Librarians and others in the library field.

NOTE: This is a Web Sampler. Information about the complete publication and how to order it is available here.

Contents

  • Benefits of Bumble Bees
  • How Bumble Bees Live
  • Which Bees are Best for Domestication
  • Catching Queens
  • Your Queens New Home
  • Feeding Your Bees
  • Encourage and Care for Your Colonies
  • Now Go Have Some Fun
  • Natural Enemies and Nest Associates
  • Tables
    • Bumble Bee Species of North America
    • Spring Flowers for Bumble Bees
    • Trouble Shooting
  • References
    • Bumble Bee Biology
    • Bumble Bee Identification for North America
    • Rearing Bumble Bees
    • Nest Box Designs

Benefits of Bumble Bees

Bumble bees are among the most charismatic of insects. Their robust frame and fuzziness combined with their charming habit of buzzing dutifully from flower to flower have brought joy to many of their onlookers. But why would you wish to step beyond these casual glances and actually handle these bees

Some people raise bumble bees out of curiosity, wanting to see firsthand what happens in a bumble bee nest, as these events are normally hidden from our sight. Others rear bumble bees to learn more about the different species for scientific reasons, as there are vast gaps in our knowledge of the biology of most bumble bee species.

Tomatoes

Greenhouse Heroes
Bumble bees are used to pollinate most tomatoes grown in commercial greenhouses. Bumble bees adapt well to use in greenhouses. Commercial bumble bee rearing companies produce bumble bee colonies year-round to serve greenhouse tomato production.

Most people raise bumble bees to benefit from their impressive pollination services, a service that is vital to both food production and the health of our ecosystem. With a large variety of problems afflicting the honey bee industry such as pests, pesticides, diseases, and poor financial returns, it is important to broaden the range of bee species used for commercial pollination.

Unlike honey bees, which were imported to the Americas by European colonists, there are many bumble bees that are native to North America. Having evolved along with our native plants, bumble bees are efficient and important pollinators of many native wildflowers and crops such as cranberries, blueberries, raspberries, squash, and melons.

Buzz Pollination

Bumble bees ensure the perfection of tomatoes by performing a special feat called "buzz pollination." The bumble bee grabs the anther cone (the flower part containing the pollen) and shakes it, releasing pollen that would otherwise stay trapped in the anther cone. The pollen is then available to fertilize flowers so that fruit can be produced. Good pollination produces large, evenly shaped, attractive fruits.

One of the qualities that sets bumble bees apart from many other pollinators is a special behavior called "buzz pollination" that some flowers, such as tomatoes, require for pollination. During buzz pollination, bees grab the flower and shake it, releasing pollen that would otherwise remain trapped within the flower. Most other bees, including honey bees, are incapable of performing buzz pollination, so bumble bee colonies are used to pollinate most tomatoes grown in commercial greenhouses.

bumble bee pollinating flowers

Bumble Bees and Native Flowers
Here a Bombus impatiens worker forages on Joe Pye Weed, Eupatorium fistulosum, a plant native to Eastern North America. Many native plants benefit from bumble bee pollination. Also, many native plants are important food sources for bumble bees.

There are also rare native wildflowers that depend on bumble bees for pollination. As natural habitats become more fragmented by housing and other land developments, wild bumble bee populations are likely to decline and some native wildflowers may lose their pollinators. Without pollination, plants cannot produce seeds. Loss of native pollinators can lead to a decline in native plants, which means less forage for the remaining native pollinator species in the coming years, creating a vicious cycle. We can help break this cycle by planting natives in our gardens to ensure local bee populations have ample forage and raising native pollinators to ensure adequate pollination of these plants.

Although bumble bees are a common sight in most flower gardens, not all bumble bee species have adapted well to changes that have taken place in the landscape due to the spread of agriculture and urbanization. Several European countries have documented declines in their bumble bee populations with some species dwindling to extinction. North America is not far behind. It has been several years since anyone has seen Bombus franklini, a bumble bee native to the estern U.S., in the wild.

We need to learn from this tragedy and prevent further bumble bee declines from occurring in North America. We can help reverse this downward trend by learning more about the diversity and biology of local bumble bee populations. By providing suitable nesting and foraging sites, we can encourage our local bumble bee populations. Bumble bee rearing is a great tool for learning more about bumble bee biology and promoting bumble bee conservation.

Bumble bees are creatures of undeniable beauty and charm. You are sure to become fascinated while watching their interactions and marveling at the ever-changing sculptures of wax inside their nests.Observing the bumble bees you raised foraging in your fields or gardens will have a deeper meaning when you understand more about these avid pollinators.



-
Agriculture \ Community \ Environment \ Family \ Garden \ Youth
Home \ Search \ News \ Workshops \ Online Shopping
About Extension \ Extension Offices
-

In accordance with the Americans with Disabilities Act, this material is available in alternative formats upon request. Please contact your University of Minnesota Extension office or the Extension Store at (800) 876-8636.

University of Minnesota Extension is committed to the policy that all persons shall have equal access to its programs, facilities, and employment without regard to race, color, creed, religion, national origin, sex, age, marital status, disability, public assistance status, veteran status, or sexual orientation.