What Is It?
Dothiorella elm wilt is a disease involving a fungus (Dothiorella ulmi) that causes the wilting and progressive die-back of American and Siberian elm trees. Symptoms of the disease are:
- Wilting, drooping, curling and yellowing of leaves, branch dieback, and browning of sapwood.
- Evident soon after leaf out and brown leaves persist on dead branches throughout the fall and winter.
- Impossible to visually distinguish from Dutch Elm Disease (DED).