A gratifying moment came last week for the rusty patched bumblebee – a highly threatened species of native bee in the U.S. that is an essential pollinator in such crops as tomatoes, blueberries and cranberries. Bombus affinus, as the rusty patched is officially known, is the first bee species in the continental U.S. to be listed as an endangered by the U.S. Fish & Wildlife Service (USFWS). It’s one of 4,000 known native bee species in North America. (Males and workers have the rusty reddish patch on their backs !)
The rusty patched bumblebee has great characteristics that make it valuable in agricultural production: it’s bigger and stronger than conventional honeybees; and its size causes higher vibration of the anthers in flowers that hold pollen, hence better crop production (tomatoes and blueberries).
These bumblebees were once a commonplace in over 28 states from Minnesota to Maine and to parts of Canada, but are now limited to small and scattered colonies in about a dozen states, including Illinois, Ohio and Minnesota, and one Canadian province. Over the past two decades, the species has declined in nearly 90% of its range. The endangered designation means that the rusty patched bumble bee is in danger of becoming extinct—and a threat to successful agricultural production — throughout all or a portion of its range, says USFWS. (See Washington Post story)
What happens next ? USFWS is developing a plan for long-term recovery – and there are regulations (opposed by the Trump Administration) that protect against deliberately damaging or destroying their habitat. The rusty patched bumble bee nests and hibernates below ground – excavation, habitat destruction and pesticide exposure can wreak havoc with the remaining populations. Many of the grasslands where it once thrived have been converted to housing developments!
Bees feed the world
Honeybees, bumblebees, solitary bees, moths and butterflies are the linchpin of multi-billion-dollar agriculture worldwide — fruit, vegetable and nut crops. There are many other pollinators – birds, small mammals, bats, beetles, and other insects – but bees are key to human survival!
More than Honey is an epic documentary (2014) on bees and their role in the food chain. Check out the film trailer.
One third of human food is pollinated by bees– including potatoes, broccoli, watermelons, oranges, cantaloupes, apples, pears, strawberries, raspberries, eggplants, almonds, cashews , Brazil nuts, and more!
What about your bee-friendly practices ?
At home, in your backyard and at work
- Cease systemic insecticides –especially neonicotinoids and fipronil (tell Bayer Crop Science to cut it out!)
- Select untreated native plants that bloom in spring, summer and fall for abundant pollinator resources.
- Leave an undisturbed area in your yard with some bare soil. 70% of native bees live in the soil.
- Leave your gardens up all winter and cut back in later spring. Many native bees overwinter in the stalks of your perennials and grasses
- Keep all chemicals off lawn and gardens, they harm pollinators and contaminate groundwater.
- Don’t spray a swarm of bees. Save bees by calling the statewide swarm catchers—extension service or the natural resources department.
- Purchase pesticide-free and non-GMO produce – fruit, veggies, nuts and grains
- Raise awareness by promoting pollinator-friendly practices in social media