• Cyphocleonus achates is a root boring weevil that is used as a biological control agent on both spotted and diffuse knapweed in the state of Montana.
    Laura Parsons, University of Idaho, PSES, Bugwood.org

  • Blueweed, a recent new invader is a state listed noxious weed and only occurs in a few counties on the western side of the state of Montana.
    Bonsak Hammeraas, Bioforsk, Norwegian Institute for Agricultural and Environmental Research

  • Russian knapweed is one of three species of knapweed that occurs in Montana; the other species are spotted and diffuse knapweed.
    Joseph M. DiTomaso, University of California - Davis, Bugwood.org

  • The leafy spurge hawk moth (Hyles euphorbiae) has proven to be a successful method of biological control on leafy spurge, a Priority 2B state listed noxious weed species in Montana.
    Norman E. Rees, USDA Agricultural Research Service - Retired, Bugwood.org

Montana Noxious Weed Education Campaign (MTNWEC)

“To educate the people of Montana about the economic and environmental impacts of noxious weeds
while encouraging the public to participate in ecologically based integrated weed management.”

Weed Questions

Need help with Weed Identification?

Read more


Shantell Frame-Martin
Montana Noxious Weed Education Campaign Coordinator
(406) 444-9491

Stay Connected

Follow us on Facebook

Stop Invasive Species in your Tracks

Read More
Montana Weed Seed Free Forage Program

Read More

In the News