Forwarding a request from Laura Van Riper, MN DNR’s Terrestrial Invasive Species Coordinator. A ray of hope for buckthorn control!?
As you are out and about this summer, could you keep a lookout for common/European buckthorn trees with witches’ broom/yellows disease symptoms? Research to identify biocontrol insects for buckthorn has been on-going since 2001. A phytoplasma disease was detected in potential biocontrol insects and Rhamnus species in Europe. It has not been reported in the US. We need to know if this phytoplasma is already present in North America. We need your help! See attached PDF flyer for details and photos. Reports can be directed to Dr. Roger Becker of the University of Minnesota (email@example.com).