Eradication is not usually possible on large areas but should be used for areas of 10 to 100 feet in diameter. The area must be replanted or another weed infestation will occur.

Below are lists of weeds to be eradicated in Douglas County, Colorado:

• A-list weeds to be eradicated 
• B-list weeds to be eradicated 
• B-list weeds to be contained or monitored and suppressed