Glossy & Common Buckthorn
Frangula Alnus & Rhamnus Cathartica
Why is it a problem?
Invasive buckthorn quickly disperses its seeds through birds and other wildlife, enabling it to rapidly outcompete other native shrubs. Additionally, it serves as a host for both alfalfa mosaic virus and crown fungus, further worsening its impact on local ecosystems.
How to identify it?
Common and glossy buckthorn is a shrub or small tree that can reach heights of up to 25 feet. Its dark green leaves are oval-shaped with a subtle serrated edge. In spring, the plant produces yellowish flowers, which form small purple berries in the fall. The twigs of buckthorn have sharp thorns, and the shrub is easily identifiable by its inner orange bark.
How to manage it?
Glossy Buckthorn
Common Buckthorn
Buckthorn seedlings can be mechanically pulled especially when the soil is moist and the population is small. Mowing can help to prevent seedlings from growing and establishing themselves. You can check out the DNR recommendations for treatment. (link)