Common tansy, Tanacetum vulgare, is an invasive weed of natural areas, pastures, forest and field margins, and rights of way. Native to Eurasia, tansy was brought to North America for use as a medicinal and ornamental plant, then escaped cultivation.
Tansy infestations are associated with:
- loss of desirable vegetation,
- toxicity to humans and livestock,
- reduction in pasture carrying capacity,
- degradation of wildlife habitat, and
- hindering reforestation and restoration efforts.
Herbicide control is costly and may not be an option for environmentally sensitive areas such as wetlands. Tansy is currently spreading throughout Canada and most northern U.S. states. It is listed as a noxious weed in counties in Colorado, Montana, Minnesota, South Dakota, Washington, and Wyoming in the U.S. and Alberta, Manitoba, and British Columbia in Canada.
 
For more information:
United States Contact:
Monika Chandler
Monika.Chandler@state.mn.us
651-201-6537
Plant Protection Division
Canada Contact:
Alec McClay, Ph.D.
alec.mcclay@shaw.ca
780-464-4962
Persons in countries other than the US or Canada, please contact either of the above listed project coordinators.
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