In simple terms a weed is just a plant out of place, however, managing some of these weeds is not a simple task. Noxious weeds are invasive non-native plants whose control is mandated by law. These plants pose a serious threat to our native habitats and impact recreation and agriculture. They have displaced 130 native Colorado plants on 553,163 acres* in Colorado (*Colorado Dept of Agriculture).
Biological Weed Management (Insects)
- Colorado Department of Agriculture Biological Pest Control (scroll down page for contact info)
- Integrated Weed Control
Chemical Weed Management
Colorado Department of Agriculture Pesticides Program
- Commercial Contractors for spraying, tillage, mowing, seeding, etc.
- Questions to Ask Small Acreage Contractors
Cultural Weed Management- A Healthy Stand of Grasses is the Best for Weed Suppression
We have a section about reseeding in our pasture management page here.
- Boulder County Noxious Weed Management Pocket Guide – Mountains
- Boulder County Noxious Weed Management Pocket Guide – Plains
- CSU Extension Factsheets
- Four Mile Weed Brochure
- Range and Pasture Weed Management
- Weed Management after Forest Mitigation
- Weed Management for Small Rural Acreages
- Boulder County Nuisance Weed Management Pocket Guide
- Colorado Weed Management Association (good for noxious weeds ID)
- USDA ARS Germplasm Resource Identification Network (good for advanced searches of all plants)
- USDA NRCS Plants National Database (good for searches for ID of weeds and native plants)
Mechanical Weed Management
Organic Weed Management
- ATTRA Weed Control Publications
- Cornell Organic Weed Mgt Website
- Acetic Acid (“Vinegar”) Herbicides
Household, culinary vinegar is 5% acetic acid. While this concentration can provide some control, most of the commercial products are 8-25% acetic acid.WHILE PERCEIVED AS LESS TOXIC HERBICIDES, THESE ACETIC ACID PRODUCTS HAVE HUMAN HEALTH HAZARDS THAT SHOULD BE TAKEN SERIOUSLY. WEAR APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT (PPE) – EYE/FACE SHIELD, RESPIRATOR, CHEM GLOVES, CHEM APRON, ETC.Acetic acid concentrations over 11% can cause burns upon skin contact. Eye contact can result in severe burns and permanent corneal injury. The 25% acetic acid concentrations registered through EPA and the states for commercial use all have restricted entry intervals of 48 hours and list personal protection equipment to be used by the applicator.
Product Label Info
Colorado State University
Weed ID Service
You may submit weed samples in our office for identification. Review “Guidelines” and fill out “ID Form”. Call 303-678-6238 with questions.