Tansy Ragwort



http://www.invasivespecies.wa.gov/priorities/tansy_ragwort.shtml





http://www.nwcb.wa.gov/detail.asp?weed=119


 










The plant is considered a Class B noxious weed by the Noxious Weed Control Board. This plant is originally native to Europe and western Asia. It is toxic to humans and livestock and is a common cause of poisoning in cattle and horses.
Tansy grows in disturbed sites such as along road sides, and in pastures and other recently cleared sites.
Smaller infestations can be controlled by physically removing all parts of the weed. Attempted biological control methods include ragwort flea beetle, the ragwort seed fly, and the cinnabar moth.

The Washington State Invasive Species Council profile for this plant can be found at this link.
http://www.invasivespecies.wa.gov/priorities/tansy_ragwort.shtml

For further information on identifying this plant and what to do if it is found, consult the Washington State Noxious Weed Control Board's page on the plant.
http://www.nwcb.wa.gov/detail.asp?weed=119

Further Reading

The U.S. Department of Agriculture's plant profile on the Tansy Ragwort.
http://plants.usda.gov/java/profile?symbol=SEJA

The King County Noxious Weed Control Board's profile and action plan for the Tansy Ragwort.
http://www.kingcounty.gov/environment/animalsAndPlants/noxious-weeds/weed-identification/tansy-ragwort.aspx