Tandy rag weed
Do not put the horses out there. Tansy ragwort, Senecio jacobaea, is a noxious weed that causes alarm for most cattle producers and horse owners. The poisonous alkaloids in this plant causes irreversible liver damage to animals (and humans) if consumed. All of its parts are toxic, with the highest amount of alkaloids in flowers then leaves, roots and stems and the plant remains toxic when dried in hay.
For management information please see:
- For an overview of Tansy and various management options:see:https://extension.oregonstate.edu/pests-diseases/weeds/tansy-ragwort
- The following article refers to Springtime management (which we are too late for now), however, it also covers your overall management options: https://extension.oregonstate.edu/pests-weeds-diseases/weeds/take-action-right-now-manage-tansy-ragw...