Centaurea virgata - Asteraceae Family - Perennial
Prevention (Prev) Monitor and destroy new plants before seed production.
Mechanical (Mech) Hand pulling, digging, cutting, mowing and tilling.
Cultural (Cult) Biological control agents, livestock grazing, and revegetation practices.
Chemical (Chem) Selective herbicides based on the plant and the specific location. Check our weed fact sheets for specific control information.
Squarrose knapweed: flower
Squarrose knapweed: foliage
Squarrose knapweed: rosettes
Squarrose knapweed: infestation
Squarrose knapweed: flowers
& Johnson, W. Managing squarrose
knapweed [PDF file]. Retrieved from https://www.unce.unr.edu/publications/files/ho/2004/fs0438.pdf
Lym, R. (2018,
April). Know your knapweeds. Retrieved
University. (2008, September). Knapweeds:
Centaurea spp., Acroptilon repens [PDF file]. Retrieved from https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/ec1596.pdf
States Department of Agriculture. (2015, February). Field guide for managing Russian knapweed in the Southwest [PDF
file]. Retrieved from https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5410125.pdf
& Randall, C. (2005, April). Biology
and biological control of knapweed [PDF file]. Retrieved from https://bugwoodcloud.org/resource/files/6223.pdf