Tansy Ragwort (Senecio jacobaea) on Aug 10, 2024
Submitter does not have a specimen
Description of specimen
The response to my previous submission was that there was an action plan to prevent seed spread. The Tansy Ragwort is going to seed now. The dense invasive growth has resulted in economic losses for nearby agricultural properties.
We did provide information to the landowner, however we have no control over what landowners do or how fast they act.
For economic farming losses the organization you want to contact is Oregon Department of Agriculture. They also have the state biocontrols staff. The three tansy biocontrols have been established for over 50 years and occur in sufficient numbers for ODA to not relocate them. They just need time to rebuild their local population. There are now some parasites that infect the moths so it isn't wise to move them around much.
Tansy seed rarely disperses more than 10-30 feet, so it's spread can be contained if it gets on your property. I realize that this doesn't help the beekeepers effected.
Keith Nasman
Invasive Species Technician
Tualatin Soil & Water Conservation District
971-330-0902
keith.nasman@tualatinswcd.org
Keith Nasman
Aug. 14, 2024, 8:03 a.m.