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Invasive Species Management
Noxious Weeds
Weeds of Concern
Weeds of Concern
Weeds that are troublesome but are not considered noxious.
This page is under construction.
Noxious Weed Information
Impacts
IPM
Landowner Responsibility
Monthly Work Plan - Noxious Weeds
Noxious Weed Identification
Arundo - Giant Reed
Black Henbane
Bouncingbet
Bull Thistle
Canada Thistle
Cheatgrass
Chicory
Chinese Clematis
Common Mullein
Common Tansy
Cypress Spurge
Dalmatian Toadflax
Dames Rocket
Diffuse Knapweed
Dyer's Woad
Eurasian Watermilfoil
Field Bindweed
Hairy Willow-Herb
Hoary Cress
Houndstongue
Jointed Goatgrass
Knotweed
Leafy Spurge
Moth Mullein
Musk Thistle
Myrtle Spurge
Orange Hawkweed
Oxeye Daisy
Perennial Pepperweed
Perennial Sowthistle
Plumeless Thistle
Poison Hemlock
Puncturevine
Purple Loosestrife
Redstem Filaree
Russian Olive
Saltcedar - Tamarisk
Scentless Chamomile
Scotch Thistle
Spotted Knapweed
St. Johnswort
Sulfur Cinquefoil
Teasel
Yellow Starthistle
Yellow Toadflax
Yellow Flag Iris
Garlic Mustard
Russian knapweed
List A - Eradication
List B - Eradication
List B - Control
List C - Control
Watch List
Weeds of Concern
Blue / Green Weeds
Pink / Purple Weeds
White Weeds
Yellow / Orange Weeds
Noxious Weed Links
Weed of the Month
Colorado Noxious Weed Awareness Campaign
What You Can Do
Citizen Science
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