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 EDDMapSPlumeless Thistle
Carduus acanthoides
Overview
Plumeless thistle is a biennial or annual thistle from Europe that invades pastures, roadsides, and disturbed areas. Each plant can produce thousands of seeds, allowing rapid spread. It reduces forage quality and can form dense infestations.
How to Identify
Spiny biennial 2-5 feet tall. Deeply lobed, spiny leaves with continuous spiny wings along the stem. Small pink to purple flower heads. Lacks the feathery pappus of other thistles.
Control Methods
Hand-pull or cut rosettes below the soil surface. Mowing before seed set. Herbicide treatment on rosettes in fall or spring.
Herbicide Recommendations
Clopyralid, picloram, or 2,4-D on rosettes. Treat in fall for best results.
⚠️ 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.
