Relative Information: The common tansy is a perennial weed. It grows well in fertile, well-drained soils, and under full sunlight.

Problems: The common tansy is poisonous to livestock and humans. However, poisoning cases are rare since the weed is unpalatable to livestock. The weed forms large, dense stocks that can compete with native species or crops.

Chemical Controls:
*all controls are shown in alphabetical order
**Read the label for ingredients, application rates, instructions and safety protocols

• Clearview
• Clearview Brush
• Clearview + 2,4-D amine
• Milestone + 2,4-D amine
• Navius
• Sightline
• Truvist

• Navius (suppression only)
• Restore II (Apply during juvenile stage)
• Reclaim II

Mechanical Controls: Effective when used with a chemical control. Repeated mowing will prevent seed production and regrowth from rootstock.

Biological Controls: No biological control agents at this time.

Cultivation: Ineffective. The root pieces will produce new weeds.

*Grazing: Somewhat effective. Not palatable to cattle and horses, however, sheep and goats are known to graze on common tansy.
*Any grazing on invasive species should not be considered.

Disclaimer:
This is for information purposes only. Please always read and follow the label of each chemical control used (herbicides). For more information on the local policies of chemical use in your area, contact your agricultural division.

This information was made possible by funding from the Southern Alberta Land Trust Society.

Other sponsors of this work include Bayer CropScience, Dow AgroSciences and Alberta Invasive Species Council.