Onopordum acanthium - Asteraceae Family - Biennial
Monitor and destroy new plants before seed production.
Hand pulling, digging, cutting, mowing and tilling.
Biological control agents, livestock grazing, and revegetation practices.
Selective herbicides based on the plant and the specific location. Check our weed fact sheets for specific control information.
King County Weed Program
Richard Old, XID Services, Inc., Bugwood.org