May 1st, 2025 (6:00 pm to 7:30 pm)
Aquatic Herbicide Case Studies
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The DEQ general pesticide permit is the only relevant permit associated with aquatic nuisance control.
**Any pesticide application to state surface waters in any amount requires permit coverage. A state surface water is any body of water or drainage system in MT. This includes things like rivers, lakes, wetlands, ditches, swales, and coulees. It does not include ponds/lagoons used solely for treating/impounding pollutants, or irrigation waters or land application disposal waters if the waters are not returned to state waters.
Presentation Summary
For the second session of Missoula County’s herbicide webinar series, Jon Gosselin will be presenting an overview of aquatic herbicide application. Gosselin will discuss the methods, modes of action, monitoring efforts, and regulations of aquatic herbicides. This presentation will focus on real-life examples of aquatic herbicide applications highlighting several different species and water body types. Additionally, he will touch on the EPA’s role, the state registration process, approvals, permits, and notifications for aquatic herbicide use.
The purpose of this presentation is to provide knowledge for decision making around the use of aquatic herbicides as a potential solution to invasive aquatic plant infestations.
Key Topics -
- How aquatic herbicides function within a waterbody
- Considerations for choosing which aquatic herbicide/chemical is ideal for a given problem
- Aquatic herbicide regulations: registration, permitting, approvals, and notifications
Speaker -
Jon Gosselin is a Technical Development Biologist for SePRO in the Northern US. In this role, he’s responsible for working with water resource management firms, lake stakeholders and government resource and regulatory agencies to best technically steward SePRO’s aquatic solutions. He’s involved with product development, field trials, and project support. Prior to his current role, Jon was a Research Assistant at the University of Florida’s Center for Aquatic and Invasive Plants and served as a Marine Science Technician in the U.S. Coast Guard Reserve. He holds an MS in Agronomy from the University of Florida with a focus on aquatic weed science, and a BS in Environmental and Resource Economics from the University of New Hampshire.
CEUs are available for registered Montana pesticide applicators. Please indicate you are an applicator on the registration page to receive credit. CEU details:
Category / Credits
10 - Dealer / 1
36 - Aquatic Pest Control / 1
37 - Right of Way Pest Control / 1
39 - Demonstration & Research Pest Control / 1
55 - Regulatory Weed / 1
60 - Private Agricultural Pest Control / 1
61 - Private Aquatic Pest Control / 1
Webinar Zoom Link: https://mt-gov.zoom.us/j/81186811082
(Please register using the link at the top of the page!)
