Not sure if this is the correct place to report this, but I have a neighbor at 23795 S Barlow Road, Canby, 97013, who has failed to control tansy ragwort on their 10 acre property. About 8 acres of the property is old pasture which is now completely covered in flowering tansy ragwort.
Expert Reviewer
Samuel Leininger Clackamas Soil and Water Conservation District 4-County Cooperative Weed Management Area Columbia Gorge Cooperative Weed Management Area