Not known to exist in Utah. Significant risk of invasion. Swift eradication is the highest priority if found.
Quick Facts
Report your sighting through EDDMapS to help us track and respond to new infestations.
Report on EDDMapSCommon Crupina
Crupina vulgaris
Overview
Common crupina is a highly competitive winter annual that invades rangelands, pastures, and open forests. It is considered one of the most aggressive invasive plants in the western United States and can form dense monocultures that displace native vegetation.
How to Identify
Slender, branching annual 1-3 feet tall. Leaves are deeply lobed and spiny-tipped. Small pink to purple thistle-like flowers. Seeds have a feathery pappus that aids dispersal. Resembles diffuse knapweed but lacks the characteristic bracts.
Control Methods
Prevention is critical. Hand-pull or dig small infestations before seed set. Herbicide treatment is most effective in fall or early spring on rosettes.
Herbicide Recommendations
Picloram, clopyralid, or aminopyralid applied in fall or spring. Always read and follow label directions.
⚠️ Always read and follow pesticide label directions. Contact your county weed superintendent for site-specific recommendations. Permits may be required near water.
Need help managing this weed?
Skyline CWMA can connect you with technical assistance, cost-share programs, and licensed contractors for treatment on your property.
