Plant Invaders of Mid-Atlantic Natural Areas
Swearingen, J., K. Reshetiloff, B. Slattery, and S.
Zwicker. 2002. Plant Invaders of
Canada thistle, a perennial member of the aster family and a native of temperate regions of Eurasia, was introduced to the United States during the 1600s and is designated as a noxious weed in 43 states. It invades a variety of dry to moist habitats including barrens, fields, glades, pastures, stream banks, wet meadows and wet prairies. Canada thistle displaces native plants, changes the structure and species composition of natural plant communities and reduces biodiversity. Abundant seeds germinate within a year, but seeds remain viable for at least 20 years. It also spreads vegetatively, through lateral roots and root fragments.
Prevention and Control
|Bargeron, C.T., D.J. Moorhead, G.K. Douce, R.C. Reardon & A.E. Miller |
(Tech. Coordinators). 2003. Invasive Plants of the Eastern U.S.:
Identification and Control. USDA Forest Service - Forest Health
Technology Enterprise Team. Morgantown, WV USA. FHTET-2003-08.