Exotic Pest Reporting
Doug Doohan, Ohio State University/ OARDC, Bugwood.org
Tansy ragwort (Senecio jacobaea) is an invasive plant. It is a native of Europe and was first detected in Montana in 1979.
When prevalent, tansy ragwort is one of the most common causes of poisoning in cattle and horses, caused by consumption of the weed found in pasture, hay or silage. Milk produced by affected cows and goats can contain toxins. Stock does not reject or avoid it in hay or silage. Its poisonous alkaloids are unaffected by drying. Honey from tansy ragwort also contains the alkaloids.
Summaries of State Plant Protection Laws and Regulations
12/04/2019 - Now is time for ragwort control
06/03/2019 - Protect livestock from harmful weeds
05/14/2019 - Be Ragwort aware
09/21/2018 - The silent killer lurking in a bale of hay
02/27/2018 - Want to be a goat coordinator? Here's your chance
08/01/2017 - To Every Weed There Is a Season
06/25/2015 - Over $2 Million to Combat Invasive Plants in B.C.