What Does A Diseased Elm Tree Look Like?
What Does A Diseased Elm Tree Look Like? Leaves wilt, turn yellow, and ultimately turn brown. Premature leaf drop. Flagging or branch death. Brown streaking in sapwood—the newly formed, softer outer layer of wood underneath the bark. What diseases can elm trees get? Disease Pathogen/Cause Laetiporus root rot Laetiporus sulfureus (formerly Polyporus sulfureus) Leaf scorch