Home > Departments > Public Works > Weed Division > List B
 
arrow Home
arrow Billboards
arrow Bio Control Options
arrow Buying and Selling Land
arrow Calendar of Events
arrow Calibration
arrow Commercial Applicators
arrow Contact Us
arrow Control Techniques
arrow Cost-share Opportunities
arrow Creating A Management Plan
arrow Excuses
arrow Field Guides
arrow Horses and Weeds
arrow Kids Konnection
arrow Links
arrow Meet the Staff
arrow Organic Farming
arrow Pesticide Spills
arrow Private Applicator License
arrow Q & A About Pesticides
arrow Reseeding
arrow Resources Books-Weed ID
arrow Reward Program
arrow South Platte Watershed Plan
arrow Success Stories
arrow Weed List A
arrow Weed List B
arrow Weed List C
arrow Weld County Code
arrow What You Can Do to Help

Weld County Weed Division - List B

The noxious weeds mandated for control are plants that are non-native to North America. Consequently, these plants do not have the natural checks found in their native land such as insects or diseases. Due to the competitive aggressive nature of these plants they tend to out compete our native vegetation by forming mono-cultures.

Plants on the “B List” have the potential to be very invasive noxious weeds that quickly transform an area. These plants are typically already established in Colorado. However, on a local level (in Weld County) they may just be moving in. Therefore, eradication or control/suppression measures are indicated next to each weed species specifically for Weld County. Some species may be listed as both eradication and control. In these cases it depends on where the infestation is in the County.

The Colorado Department of Agriculture is working on the “B list” and each year they select 4 to 5 additional species to require control of. As these species are selected, this list will be updated with the management requirement. At this time it is believed that the majority of the species on this list will be designated as eradication in Weld County.

Call 970-304-6496 ext. 3770 if you have any questions.

“List B” noxious weeds

Picture Name Wanted Dead Fact Sheet Action
Absinth wormwood Wanted Dead Fact Sheet Eradication
Black henbane Black Henbane Wanted Dead    
  Bouncing Bet      
  Bull thistle      
Canada thistle   Fact Sheet Control
Chinese clematis Fact Sheet   Eradication
  Common tansy      
  Common teasel      
  Corn chamomile      
  Cutleaf teasel      
Dalmatian toadflax   Fact Sheet Eradication/Control
  Dames’s rocket      
Diffuse knapweed   Fact Sheet Eradication/Control 
Eurasian watermilfoil  Wanted Dead Fact Sheet  
Hoary Cress   Fact Sheet Eradication/Control
Houndstongue Wanted Dead Fact Sheet Eradication
Leafy spurge   Eradication/Control
  Mayweed chamomile       
  Moth Mullein      
Musk thistle   Fact Sheet

Control

Oxeye daisy Wanted Dead    
Perennial pepperweed   Fact Sheet Eradication/Control
  Plumeless thistle     Eradication
  Quackgrass      
 

Redstem filaree

     
Russian knapweed   Fact Sheet Control
Russian Olive

Russian Olive

  Fact Sheet Eradication/Suppression
Salt Cedar / Tamarisk Wanted Dead Fact Sheet Eradication
 

Scentless chamomile

     
Scotch thistle   Fact Sheet Control
Spotted knapweed Wanted Dead   Eradication
Spurred anoda   Fact Sheet  
Sulfur Cinquefoil Wanted Dead    
Venica mallow Wanted Dead Fact Sheet Control
 

Wild caraway

     
Yellow nutsedge   Fact Sheet Control
Yellow toadflax Wanted Dead Fact Sheet Eradication/Control