Centaurea maculosa - Asteraceae Family - Biennial or short lived perennial
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.
Spotted knapweed: flowers
Spotted knapweed: rosette
Spotted knapweed: flowers going to seed
Spotted knapweed: stem and foliage
Spotted knapweed: infestation
Spotted knapweed: roots and foliage
Spotted knapweed: seedlings
(2013, November). Diffuse and spotted
knapweed – 3.110. Retrieved from http://extension.colostate.edu/topic-areas/natural-resources/diffuse-and-spotted-knapweed-3-110/
J.M., G.B. Kyser et al. (2013). Weed
Control in Natural Areas in the Western United States [PDF file]. Weed
Research and Information Center, University of California. Retrieved from https://wric.ucdavis.edu/information/natural%20areas/wr_C/Centaurea_stoebe.pdf
(2018, March 7). Spotted knapweed
management with herbicides. Retrieved from https://www.techlinenews.com/articles/2012/12/30/spotted-knapweed-management-with-herbicides
Species Compendium. (2018, June 28). Centaurea
stoebe subsp. Micranthos (spotted knapweed). Retrieved from https://www.cabi.org/isc/datasheet/12040
(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
& Randall, C. (2005, April). Biology
and biological control of knapweed [PDF file]. Retrieved from https://bugwoodcloud.org/resource/files/6223.pdf