Board of Pesticides Control Update
The Board of Pesticides Control wants to keep you informed on issues that may affect you. We welcome your input and feedback. Please send your comments to pesticides@maine.gov.
September 1, 2023 at 9:00 AM in Room 101 of the Deering Building located at 90 Blossom Lane in Augusta. This will be a hybrid meeting. For more information, visit the Board Meetings Page.
The following program has been approved for pesticide recertification credits. More recertification opportunities may be found on the BPC Credit Calendar.
- August 11, 2023–Maple Sugarbush Management, 8:30 AM-3:30 PM
Location: Governor’s Events Center, 376 Main St., Waterville, ME
Approved for 1 pesticide credit
To register and for more information
- August 28, 2023–Emerald Ash Borer DACF Municipal Quarterly Update, 10:30 AM-12:00 PM
Location: Virtual on Microsoft Teams
Approved for 1 pesticide credit
Those seeking credit must preregister by contacting: Stephen.J.Nicholas@maine.gov
Always check to ensure all products distributed or used are currently registered in the State of Maine. Get a list of the current Maine registrations.
The Board voted at the July 21, 2023, Board meeting to initiate rulemaking for CMR01-26 Chapter 20, Chapter 31, Chapter 32, and Chapter 41. Proposed rule will be posted to the BPC’s rulemaking webpage and the Secretary of State’s proposed rulemaking page in the coming weeks. A public hearing is scheduled for September 1, 2023, for public comment regarding the proposed amendments.
Recently EPA released a Draft Herbicide Framework Document that describes how the agency plans to incorporate protections for endangered species into pesticide registrations and re-registrations. EPA has recently been directed by the courts to make rapid changes to how it implements the Endangered Species Act (ESA). Under the old approach, EPA has completed fewer than 5% of all the ESA actions required by law. As a result of this court action EPA is proposing an entirely new approach to incorporating endangered species into how it registers and re-registers pesticides.
Instead of looking closely at each pesticide’s overlap with each endangered species and critical habitat, EPA is creating broad mitigation plans that can be applied to areas with protected species. Maine is home to the critical habitats for two endangered species, the Canada Lynx (Lynx canadensis) and the Atlantic Salmon (Salmo salar). These critical habitats cover a large portion of the state, see Figure 1. Growers in the ranges of protected species and habitats would be required to use additional mitigation measures selected from a pick list on the label to comply.
The draft herbicide framework and accompanying documents are available in docket EPA-HQ-OPP-2023-0365 for public comment for 60 days. EPA and USDA are hosting a webinar discussing this plan on August 10th, registration is required.
(Figure 1. Map of Maine taken from US Fish and Wildlife Service page showing the Critical Habitats in Maine. Red areas indicate the designated locations of critical habitats for Canada Lynx and Atlantic Salmon)
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The U.S. Environmental Protection Agency (EPA) has flagged serious health risks associated with the herbicide dimethyl tetrachloroterephthalate (DCPA). An assessment reveals that workers and individuals exposed to DCPA face potential harm, particularly fetuses of pregnant women. The EPA is considering canceling DCPA registrations due to these risks, but the process could take several years.
DCPA is used to control weeds in both agricultural and non-agricultural settings, including crops like cole crops, onions, and other vegetables. As part of its periodic review, the EPA examined studies on DCPA's effects. The pesticide's registrant, AMVAC, submitted numerous studies during the previous review, but the EPA deemed them insufficient. Specifically, a crucial study on thyroid toxicity was missing. In 2022, the EPA finally received this data, confirming significant fetal thyroid effects. Surprisingly, even low doses of DCPA caused adverse effects in the fetuses of pregnant rats. This raised concerns about human fetal health when exposed to DCPA.
The risk assessment revealed risks to workers, especially pregnant women applying DCPA. Exposures up to 1,500 times the safe level were modeled from current uses. Fetuses of individuals involved in post-application tasks and those living near treated areas were also at risk. Even turf golf courses and athletic fields treated with DCPA posed concerns.
Alongside the assessment, the EPA released a companion document summarizing the thyroid toxicity data. Based on the severity of the risks identified, the EPA is evaluating potential mitigation strategies. Public input will be considered, but if no feasible solutions arise, the EPA may cancel all DCPA registrations. The DCPA comment period lasts 30 days and can be accessed at www.regulations.gov (docket EPA-HQ-OPP-2011-0374).
- There have been a number of instances this season where use of an unregistered pesticide has been identified. All pesticides are required to be registered for use by the State of Maine, including products that are categorized as exempt (25b) by EPA. It is a violation of State pesticide law to use or distribute pesticides that are not registered. You can verify product registration on the BPC website at https://www.maine.gov/dacf/php/pesticides/index.shtml
- Commercial pesticide applications being made at the incorrect property continues to be an issue. It is inherent that spray contracting firms have a positive property identification system in place. It is the responsibility of the commercial master applicator to ensure that their company's applicators have the training and tools to positively identify the application site and avoid unauthorized pesticide applications.
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