Brought to you by the Missoula Valley Land Managers

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LEAVE NO WEEDS

• Brought to you by the Missoula Valley Land
  Managers

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Leave No Weeds Principles

• Be aware and prepare
• Camp and travel in weed free areas
• Pull and pack out weeds when possible
• Report weed infestations

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What is a weed?

• An unwanted plant
• This depends on your goals and values

What is a noxious weed?

• A weed that the state and/or federal government
  has identified as a serious threat- they must be
  controlled
• Not all natural area weeds are noxious weeds

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Weeds Whats the Problem?

• These plants did not evolve in this system
• These plants did not come with natural controls
  such as insect predators, plant pathogens, and
  other competing plants
• Grow rapidly and exclude desirable native plant
  species

Missoula Hills Today
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Economic and Ecological Problems with Weed
Invasions

• Decrease the economic value of land and crops
• Increase soil erosion and sedimentation
• Decrease fish habitat
• Decrease forage for livestock and wildlife
• Displace native plant species
• Lower plant biodiversity
• Affect recreational value

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Increases erosion into streams and rivers
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