Yellow toadflax (Linaria Vulgaris) is a State List B species found primarily in eastern Delta County along the Stewart and Fire Mountain Ditches and the lands irrigated by that water. Spotty patches also occur on the North Fork of the Gunnison and the main stem of the Gunnison below Pleasure Park.
The primary seed source has been the Coal Creek drainage south of Paonia Reservoir.
Over 860 acres were inventoried and mapped in 2005 on both National Forest and private lands. Intensive control efforts were begun in 2007. These efforts were led by the U.S. Forest Service Paonia District office and the Delta County Weed Program. Over $100,000 was spent on this effort. Delta County's Weed Program received $35,000 in grants that was applied to this effort.
The county management strategy is containment throughout the county. Monitoring and control efforts will continue in the Coal Creek drainage. Toadflax is a creeping perennial that grows up to two feet tall and is often profusely branched. The flowers look like typical snapdragons, with a pale yellow spur and darker yellow to orange throat. The numerous leaves are linear and pointed. Also called butter and eggs, this is a very persistent plant.
This is a very difficult plant to eradicate. The extensive root system must be stressed continually. Mechanical control is often not effective on larger patches, and may spread root pieces. Herbicides are effective but choice of product and control timing is very important. Biological control agents are available but biological control is not recommended in Delta County because of the widely dispersed infestations. The exception is an orchard infestation on the Gunnison River. Success on Coal Creek was achieved with a combination of the herbicides Tordon, Telar and 24D.
If you have toadflax, the Delta County Weed Program will treat it for you at no cost.
Webb Callicutt is the Delta County Weed Program Coordinator and can be contacted at 872-3090 or
. Email gets quickest response. More information about yellow toadflax, including photos, can be found at www.
deltacounty.com. Press the Weed Program tab under Services.