How to report a suspected pesticide-related bee kill
The Oregon Department of Agriculture (ODA) Pesticides Program, responds to all allegations of bee kills or die-off's alleged to be pesticide related.
Pesticide investigators may
- Collect physical evidence (such as dead bees or treated vegetation)
- Collect and review pesticide application records
- Interview beekeepers and pesticide applicators
ODA often works with Oregon State University (OSU) and beekeepers to identify whether bee kills or die-off's are pesticide related, or the result of poor nutrition, parasites, disease, or other factors. In certain instances, dead bees are analyzed by the ODA laboratory for pesticide residues.
During the investigation, ODA uses standard investigative protocol as well as US EPA Guidance on responding to bee-related incidents. The investigative findings are provided to the US EPA on a quarterly basis.
When to contact ODA
Alleged pesticide-related incidents must be reported in a timely manner. This is because pesticide residues break down over time, bee carcasses degrade, crops are harvested, memories fade, or pesticide application information may not be available.
How to contact ODA
Individuals may file a complaint via
Individuals may also call 211 to report a bee-related incident 24-hours a day. Information provided will be directed to the Pesticides Program for follow up.
Bee aware of bees and linden trees
2015 Pesticide Advisory: Bees and Linden Trees
Reminder about ODA's 2015 law prohibiting the use of any product containing the neonicotinoid insecticides dinotefuran, clothianidin, imidacloprid, or thiamethoxam, regardless of application method, on linden trees, basswood trees or other Tilia species. Document
Pollinators and pesticide labels
Pollinators are extremely important to Oregon's agricultural community, pollinating many crops. Oregon is proactive in protecting bees and other pollinators and currently requires specific label language prohibiting the use of the neonicotinoid pesticides, dinotefuran and imidacloprid, on linden, basswood and Tilia species trees.
At the federal level, the Environmental Protection Agency (EPA) has required special label restrictions to neonicotinoid pesticides in order to protect pollinators. The active ingredients that will have special label language are as follows:
Alternatives to Neonicotinoid Insecticides (except for acetamiprid) for Use on Landscape Ornamentals
Alternatives to Neonicotinoid Insecticides for Use in Nurseries
EPA - Information on Residue Toxicity Time for Growers and Beekeepers
EPA data to use as a means of gauging the relative lengths of time that pesticide products may remain toxic to bees. Website
How to Reduce Bee Poisoning from Pesticides (PNW 591)
Sudy material for some pesticide exams. How to protect pollinators. Website
National Pesticide Information Center (NPIC)
Neonicotinoid Pesticides and Honey Bees fact sheet
Information provided by Washington State University Extension. Fact sheet
Oregon State Beekeepers Association
Swarm collection and bee and beekeeping information Website
Pesticide products containing clothianidin and thiamethoxam registered in Oregon
Pesticide products containing clothianidin and thiamethoxam registered in Oregon labeled for use on ornamentals and trees grown in landscapes and/or nurseries. Use on linden/tilia spp. is prohibited. Document
Pollination and Protecting Bees and Other Pollinators
Information produced by Washington State University Extension. Document
Preventing or Mitigating Potential Negative Impacts of Pesticides on Pollinators Using Integrated Pest Management and Other Conservation Practices