Aquatic Weeds

Day 5 – Aquatic Weeds

Did you know…? Montana’s state weed list also includes aquatic invasive plant species! Some plants are submerged, while others are not. The state list has eight (8) aquatic invasive plant species listed:

  • Priority 1B: Purple loosestrife
  • Priority 2A: Yellowflag iris, Eurasian watermilfoil, Flowering rush
  • Priority 2B: Curlyleaf Pondweed
  • Regulatory (3): Hydrilla, Brazilian waterweed, Parrot feather watermilfoil

 

For Day 5 of MNWAW, we will learn about three of the eight species: Eurasian watermilfoil, Curlyleaf pondweed, Yellowflag iris. Use these resources to learn something new and/or as a way to promote and distribute information to your constituents, family, friends, and neighbors.


Fact Sheets
Eurasian Watermilfoil—MSU Extension
Curlyleaf Pondweed—MSU Extension
Yellowflag Iris—MSU Extension

 

Videos/Podcasts
Eurasian Watermilfoil—Lower Hudson PRISM
Eurasian Watermilfoil—University of Idaho
Curlyleaf Pondweed—MT Department of Agriculture
Curlyleaf Pondweed—University of Idaho
Yellowflag Iris—MT Department of Agriculture
Yellowflag Iris—University of Idaho
Eurasian Watermilfoil from a hot spring—Explore Biodiversity; Rob Nelson

 

Activities & Helpful Websites
Help Protect Montana from Aquatic Invasive Species activity book—Montana FWP
Aquatic Invasive Species Singalong—Invasive Species Action Network

 

Other Articles & Information
AIS Species Identification Guide—Montana FWP
Protect Montana Waters from Aquatic Invasive Species—Montana FWP
Eurasian Watermilfoil—Montana Outdoors

 

As MNWAW is declared statewide, help us create a united front in the fight against noxious weeds in Montana, educate those around us, and celebrate the wins. Don’t forget to watch our gun raffle fundraiser LIVE on our Facebook page at 5pm.

Follow along, share, and engage with us!!

MWCA Business Members

Upcoming Events

Upcoming Events

September 19, 2026
2026 Annual Weed Whackers Ball
Wise River Community Center
Online registration is not available, please purchase tickets at the door. 

September 21 – 25, 2026
ATV Train the Trainer Course – FILLED
Cascade County Weed District, Vaughn, MT
Please contact Levi Capdeville for more information at (406) 263-9333.

October 6, 2026
MWCA Board of Directors Meeting
VFW Lodge, Libby MT
9 a.m. – 3 p.m.
Agenda TBA

October 6, 7 & 8, 2026
MWCA Fall Weed Manager Training
VFW Lodge, Libby, MT
Agenda
Hard Copy Registration
Online Registration

MWCA Feed

Help Shape the Future of Weed Management in Montana

The Montana Weed Control Association (MWCA) is looking for members who are interested in becoming more involved and helping strengthen our organization and the weed management profession across Montana.

To find out more, please click here.

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