Tansy ragwort (Senecio jacobaea) is an invasive weed with a long and deadly Mature Tansy Plant history in the Pacific Northwest. In Oregon, it is designated as a Class B invasive weed. It is ...

Tansy ragwort is a Class B noxious weed, meaning it is a high priority for removal and is toxic to animals and humans. Some consider tansy ragwort and Scotch broom ...

CORVALLIS — Tansy ragwort has made a comeback in western Oregon through a combination of weather and a “down cycle” for the three insects used to control this toxic weed.

Back in the 1970s and 1980s, Oregon’s farmlands were hit by a nasty new weed called tansy ragwort. When cattle and horses ate enough, alkaloids in the ragwort cause liver damage and death.

After 25-year fight, native plant species are recovering ...

Property owners pulling up noxious weed tansy ragwort can bring it to Castle Rock for free disposal Saturday. The Cowlitz County Noxious Weed Control Program is accepting bagged flowering tansy ...

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Tansy ragwort is pretty, poisonous - and it's back. A variety of sunflower that's toxic to some livestock, the noxious plant's comeback is blamed on Oregon's cool, wet La Nina spring and chilly ...

Tansy ragwort (Senecio jacobaea) is a biennial from Eurasia. It is often found in poorly-managed pastures, riparian areas, roadsides, forests and gardens. This plant may reach six feet tall with ...