Source: California Invasive Plant Council
URL of this page: http://www.cal-ipc.org/ip/management/plant_profiles/Acroptilon_repens.php
Acroptilon repens (Russian knapweed)
Photo courtesy David Chang
Acroptilon repens (Russian knapweed) is a perennial forb (family Asteraceae) found heavily through out California. It may have allelopathic properties. This plant is toxic to horses and crowds out native species.
Cal-IPC Inventory rating: Moderate
Cal-IPC Resources on Acroptilon repens
- California Invasive Plant Inventory Plant Assessment Form.Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
- CalWeedMapper: Statewide maps, climate models, and reports.
- Cal-IPC News - Articles from our quarterly newsletter. (None for this species.)
- Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium. List of articles on Acroptilon repens.
Cal-IPC News Articles
- Brusati, E., D. Morawitz, et al. (2011). Prioritizing Regional Response to Invasive Plants in the Sierra Nevada. Cal-IPC News. 19: 4, 5, 10.
- Smith, R. L., V. F. Carrithers, et al. (2006). Managing rangeland invasive plants with Aminopyralid (MilestoneTM). Cal-IPC Symposium. Rohnert Park, CA.
- Carrithers, V., B. Miller, et al. (2005). Aminopyralid: A new reduced risk active ingredient for control of broadleaf invasive and noxious weeds. California Invasive Plant Council Symposium 2005. Chico, CA.
- Clines, J. (2005). Preventing weed spread via contaminated hay and straw. California Invasive Plant Council Symposium 2005. Chico, CA.
- Donaldson, S., W. West, et al. (2003). Getting the job done: Working within the regulatory environment at Lake Tahoe to manage weeds. California Invasive Plant Council Symposium 2003. Kings Beach, California.
- Gerlach, J. D. (1997). How the west was lost: Reconstructing the invasion dynamics of yellow star-thistle and other plant invaders of western rangelands and natural areas. California Exotic Pest Plant Council Symposium '97. Concord, CA.
Other Resources on Acroptilon repens
- USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
- Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
- The Nature Conservancy Management Summary - Information compiled by TNC land managers. Photos included for some species.
- CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
- CalPhotos - Images of plants taken mostly in California.
- Natural Resource Projects Inventory - State database with information on resource management projects throughout California. Query by the species of interest.