Noxious Weed

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Noxious weeds have a broad range of environmental impacts, and must be managed properly to conserve water and protect animal habitats. In addition to the information listed below, please visit the following sites for additional resources concerning noxious weeds in Colorado:
Poisonous plant Information

Eagle County Noxious Weeds:

Eagle County has adopted the State of Colorado Noxious Weed lists A, B, and C as well as state-mandated methods of control. Please visit the Colorado Department of Agriculture Noxious Weed List for more information.  

Weeds of Special Interest in Eagle County

List A Species (Eradication required)
  • Cypress spurge
  • Knotweeds (Japanese, Giant, and Bohemian)
  • Myrtle Spurge
  • Orange Hawkweed
  • Purple loosestrife
List B Species (Stop the spread, containment)
  • Absinth wormwood
  • Bouncingbet
  • Bull thistle
  • Canada thistle
  • Chinese clematis
  • Common tansy
  • Dalmatian toadflax
  • Dame’s rocket
  • Diffuse knapweed
  • Hoary cress (whitetop)
  • Houndstongue
  • Jointed goatgrass
  • Leafy spurge
  • Musk thistle
  • Oxeye daisy
  • Perennial pepperweed
  • Plumeless thistle
  • Russian knapweed
  • Russian olive
  • Salt cedar (tamarisk)
  • Scentless chamomile
  • Scotch thistle
  • Spotted knapeed
  • Yellow toadflax
List C Species (Provide information to the public, suppression)
  • Chicory
  • Common burdock
  • Common mullein
  • Downy brome (cheatgrass)
  • Field bindweed
  • Halogeton
  • Poison hemlock
  • Redstem filaree
Watch List Species (Potential threat, report populations to the State)
  • Baby’s breath
  • Common reed (phragmites)
  • Siberian elm
  • Swainsonpea
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