More than 50,000 bumble bees died when 55 blooming linden trees were sprayed with the pesticide dinotefuran (also known as Safari).
On June 17, 2013, the largest native bee kill ever recorded occurred in Wilsonville, Oregon. More than 50,000 bumble bees died when 55 blooming linden trees were sprayed with the pesticide dinotefuran (also known as Safari) in a Target parking lot. This loss represents potentially hundreds of wild bumble bee colonies. Incidents like this one can easily go unnoticed, especially when poisonings occur in agricultural fields or natural areas, and may be happening frequently.
Originally, Xerces scientists responded to telephone calls from concerned citizens and after visiting the parking lot, reported the incident to the Oregon Department of Agriculture (ODA). ODA lab tests confirmed that the deaths were caused by dinotefuran, which was applied to the blooming linden trees to control aphids, whose honeydew was dripping on cars below.
This incident received a great deal of media coverage (links to “media coverage” section farther down page) in newspapers and on television and radio in Oregon and further afield, in part because it occurred during National Pollinator Week. In another unfortunate coincidence, the product applied to the linden trees, Safari, is manufactured by a company that sponsors National Pollinator Week.
Dinotefuran is one of a group of insecticides called neonicotinoids. These are systemic chemicals, meaning they are absorbed into plant tissue, making the plant itself toxic to insects. They are very long-lasting, and because they can be present in the pollen and nectar, they can be highly toxic to bees. Neonicotinoids are implicated in bee die-offs the world over. The European Union has banned certain uses of neonicotinoids for the next two years due to risks to pollinators.
Sadly, as is often the case, it takes a tragedy to push forward change. Progress to prevent future bee kills has been made since June. The Oregon Department of Agriculture declared a 180-day ban on the use of dinotefuran in that state, and at a national level, the Saving America’s Pollinators Act (link to press release) was introduced into the United States Congress. This act suspends certain uses of neonicotinoids, providing a time-out for these insecticides until the Environmental Protection Agency (which regulates pesticide use in the United States) can determine whether they are safe to use on crops that are visited by bees. Xerces scientists helped write the act, which Representatives Earl Blumenauer and John Conyers introduced into Congress in July.
In urban areas, pesticides are used primarily for cosmetic purposes—to have a weed-free lawn, a blemish-free rose, or an aphid-free linden tree. The risk of losing valuable pollinators, such as bees, far outweighs any benefit from this type of cosmetic use.
To learn more about the events in Wilsonville and what you can do to help pollinators, please see the links below.
50,000 Bumble Bees Are Dead, Do You Want to Help?
Many of you have contacted us outraged over the mass killing of bumble bees from pesticide poisoning in Wilsonville, OR. You have the power to protect bumble bees and other pollinators from pesticides. Click here to find out how!
Xerces Society Press Releases
- June 18, 2013: Mystery Bee Kill: Causes Being Sought
- June 21, 2013: Pesticide Causes Largest Mass Bumble Bee Death on Record
- June 27, 2013: Scientists Call for an End to Cosmetic Insecticide Use After the Largest Bumble Bee Poisoning on Record
- July 16, 2013: Blumenauer, Conyers Introduce Save America’s Pollinator Act
- December 19, 2013: Bumble Bee Kills: Negligence Proven, Fines Inadequate
- February 10, 2014: Save Oregon's Pollinators Act addresses bee declines
- "25,000 bumblebees killed, dropping from trees in Wilsonville; pesticide suspected", The Oregonian, 6/19/13
- "Buzzkill: Huge bee die-off in Oregon parking lot blamed on insecticide spraying", Grist, 6/20/13
- "25,000 Bees Found Dead In Oregon Parking Lot, Environmental Organization Says". The Huffington Post, 6/20/13
- "Pesticide blamed in death of 25,000 bumblebees in Oregon", The LA Times, 6/21/13
- "Pesticide causes largest mass bumblebee death on record", The Portland Tribune, 6/21/13
- "State investigating death of 'hundreds' of bees in Hillsboro days after 50,000 found in Wilsonville", The Oregonian, 6/24/13
- "Oregon temporarily restricts pesticide use following bee deaths", The LA Times, 6/27/13
- "The day the bees died", Al Jazeera America, 8/20/13
Video and Audio Coverage
- "Pesticide blamed for record bumblebee deaths", KGW.com, 6/21/13 (video)
- Interview with Xerces' Executive Director, Scott Hoffman Black, Eat Drink Explore Radio, 6/23/13
- "Mass bee deaths in Oregon linked to insecticide use" (interview with Scott Hoffman Black), CBC Radio, 6/25/13