Colorado Weed Mapping
2002, 2004, 2005 & 2006 QuarterQuad Survey
Data is requested from the County Weed Supervisors on an annual basis (no mapping was done in 2003) and infested acreages estimates are per 9,000 acre QuarterQuad. A QuarterQuad is one quarter of a standard 1;24,000 U.S.G.S. 7.5min topographic quadrangle.
Each block of color represents an infested 9,000 acre area: lighter red blocks indicate the presence of relatively new infestations, while darker red blocks indicate the presence of a greater number of infested acres within the QuarterQuad. Counties that have not reported their weed infestations are indicated with a cross-hatch pattern.
In 2002, Bent, Crowley and Washington Counties did not report. In 2004, Baca, Bent, Costilla, Prowers and San Juan Counties did not report. In 2005, Clear Creek, Costilla, Elbert, Phillips, San Juan, and Montezuma Counties did not report. In 2006, Bent and Elbert Counties did not report. For more specific locations of noxious weeds, you should contact the appropriate County Weed Manager .
You may download QuarterQuad datasets at the bottom of this page.
Weeds Mapped Statewide By QuarterQuad:
(Click on the names to view the map images and pictures of the weed)
|
Common |
Scientific |
Data Year |
| Absinth Wormwood | Artemisia absinthium | 2004 |
|
Hyoscyamus niger |
2005 | |
|
Cirsium vulgare |
2002 | |
|
Clematis orientalis |
2004 | |
| Cypress spurge | Euphorbia cyparissias | 2006 |
|
Linaria dalmatica |
2002 | |
|
Hesperis matronalis |
2002 | |
|
Centaurea diffusa |
2005 | |
|
Cardaria draba |
2006 | |
| Houndstongue | Cynoglossum officinale | 2006 |
|
Euphorbia esula |
2002 | |
| Meadow knapweed | Centaurea pratensis | 2006 |
| Mediterranean sage | Salvia aethiopis | 2006 |
| Myrtle spurge | Euphorbia myrsinites | 2006 |
|
Hieracium auranticaum |
2006 | |
|
Chrysantheum leucanthemum |
2005 | |
|
Lepidium latifolium |
2006 | |
|
Carduus acanthoides |
2004 | |
|
Lythrum salicaria |
2006 | |
|
Centaurea repens |
2002 | |
|
Elaeagnus angustifolia |
2002 | |
|
Tamarix parviflora |
2004 | |
|
Onopordum acanthium |
2002 | |
|
Centaurea maculosa |
2004 | |
|
Centaurea solstitialis |
2006 | |
|
Linaria vulgaris |
2005 |
Eight Additional Weeds Mapped By QuarterQuad:
The maps below do not depict the statewide distribution and abundance of these eight weed species. Although the Colorado Department of Agriculture has not yet requested statewide data for these particular species, some county weed managers have volunteered this data and we have assembled the information here. These maps will continue to be updated as local jurisdictions provide additional data. If and when the Department endeavors to gather statewide data for these species, these maps will be moved to the list above.
|
Common |
Scientific |
Data |
| Canada thistle | Cirsium arvense | 2002 |
| Cheatgrass | Bromus tectorum | 2002 |
| Eurasian Watermilfoil | Myriophyllum spicatum | 2004 |
| Field bindweed | Convolvulus arvensis | 2002 |
| Jointed goatgrass | Aegilops cylindrica | 2002 |
| Kochia | Kochia scoparia | 2002 |
| Musk thistle | Carduus nutans | 2002 |
