Small Acreage Management:
How can I control weeds on my property?
1. Identify exactly what it is you want to get rid of. Use plant id guides or take a sample to your local CSU Extension office for identification.
2. Learn about the life cycle of your weeds in order to determine when the best time is to attack the plants.
3. Know that weeds can be controlled mechanically (mowing or shovel), chemically, or biologically. Find out what methods work best for the particular weeds on your property. It may be a combination of all three.
4. If you are unsure, call your local Weed District or CSU Extension for help.
Carduus nutans L.
What are noxious weeds?
Noxious weeds are non-native plants that disrupt native vegetation because they have no natural controls and are able to adapt to varied climate conditions. As a result of the Colorado Noxious Weed Act, Colorado noxious weeds have been placed on three separate lists: A, B, and C.
List A plants are designated to be eliminated everywhere in Colorado.
List B plants includes plants whose continued spread should be stopped.
List C plants includes plants in which control is recommended.
Noxious Weed Management Pocket Guide: - An easy to print and carry, Noxious Weed Pocket Guide gives you the information to identify and help manage some of the common weeds.
- How Weeds Grow - short videos on how weeds grow
- Using Bindweed Gall Mites to Manage Field Bindweed - 3 minute video about biological control of bindweed
Biological Pest Control
More Info on Weeds
- Colorado Environmental Pesticide Education Program
- Colorado Weed Management Association
- ATTRA Pest Management, weeds, disease, and insects
- Canada Thistle
- Diffuse and Spotted Knapweed
- Leafy Spurge
- Musk Thistle
- Noxious Weeds & Invasive Plant Species
- Puncturevine (a.k.a. goatheads, bullheads, and Texas sandbur)
- Range and Pasture Weed Management
- Russian Knapweed
- Weed Management for Small Rural Acreages
- Wyoming's Barnyards and Backyards
Invaders Database System (University of Montana) searchable database of the noxious weed lists for all U.S. states and six southern provinces of Canada. The database can be searched by plant name, state name, or by clicking on a map.
NRCS Noxious and Invasive Weeds Federal and state noxious weed lists, an invasive plant list, or an introduced plant list, each with links to more information.
- Federal Noxious Weed List
- State Noxious Weed Lists
- Federal and State Noxious Weeds
- Weeds of the U.S.
- Introduced Plants of the PLANTS Floristic Area
Western Weed Resources Catalog a collection of over 1000 books, brochures, articles, videos, and internet resources.
Federal Information and Programs:
US National Arboretum information on invasive plants
Alien Plant Invaders of Natural Areas a web-based project of the Plant Conservation Alliance's Alien Plant Working Group, that provides information for the general public, land managers, researchers, and others on the serious threat and impacts of invasive alien (exotic, non-native) plants to the native flora, fauna, and natural ecosystems of the United States.
Center for Invasive Plant Management a regionally focused Center based at Montana State University. We work in partnership with county, state, and federal agencies, tribes, nongovernmental organizations, private industry, commodity groups, and academic institutions.
Cornell University Ecology and Management of Invasive Plants Program conducts research to assess the ecological impacts of introduced plant species.
High Plains Invasives Project a 3-year program targeting seven currently uncommon invasive weeds in Colorado’s Eastern High Plains.
International Weed Science Society a worldwide scientific organization, whose goal is to supplement and complement their vital role. Additionally, IWSS provides benefits and functions of a weed science society not currently existing at a national or regional level.
Weed Science Society of America a non-profit professional society that promotes research, education, and extension outreach activities related to weeds; provides science-based information to the public and policy makers; and fosters awareness of weeds and their impacts on managed and natural ecosystems.
Western Society of Weed Science for weed science professionals working throughout the Western United States. Membership is open to anyone, including federal, state, and local employees, private company personnel, crop consultants, growers, or others interested in a wide variety of weed science related information.
SAM Newsletter Articles
- Goats for Weed Control - summer 2014
- A Promising Control for Canada Thistle - winter 2014
- Thistles - summer 2013
- How to Read a Pesticide Label - summer 2013
- Facts About Dalmation Toadflax - spring 2013
- Palisade Insectary offers Biocontrol Options – summer 2012
- Weeds Are Impacting Our Landscape – winter 2012
- Facts About Purple Loosestrife – summer 2011
- Facts About Diffuse Knapweed – spring 2011
- Early Weed Detection for Better Management – winter 2011
- Facts About Scotch Thistle – fall 2010
- Use “weedy” Natives to Fight Noxious Weeds – summer 2010
- Toxic Weeds and Horses – spring 2010
- Friend or Foe? – winter 2010
- What’s In Your Garden: Weed or Wonderful? – summer 2009
- Leafy Spurge: A Colorado Noxious Weed – spring 2009
- The Impact of Weeds – spring 2009
Updated Tuesday, August 05, 2014