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Common tansy, an aromatic perennial with a long history
of medicinal use, has become a problem weed in pastures
and along roadsides, fence lines and stream banks. It is
mildly poisonous but unpalatable to livestock and to
humans in large doses. Cultivation for traditional folk
medicines and other uses has assisted its spread throughout temperate regions of North America. Adequate control of infestations can be achieved through prevention,
applications of metsulfuron (Escort®) and by mowing or
mechanical removal. For more information concerning
common tansy contact your local weed district or county
Extension office.
This information is for educational purposes only. Reference to commercial products or trade names does not imply discrimination or endorsement by the Montana State
University Extension Service (source summary)