Diseased limbs should be removed and destroyed. If the whole plant dies, do not replace it with another susceptible plant. Because drought enhances the effect of Verticillium, plants should be watered thoroughly. Usually the equivalent of 2 inches of water every couple of weeks should help. Fertilizer may also help by improving the vigor of the plant.
American elm is particularly susceptible and has been eliminated from many communities.
Because DED is vascular wilt disease, drought can accentuate it. Also, the elm bark beetles that transmit the fungus from tree to tree are more attracted to stressed trees than to healthy trees. As with Verticillium wilt, the first symptoms are yellowing or wilting on one or a few branches. Keeping American elms healthy will help them to better resist infection. Because DED is usually lethal, a multiple-pronged management scheme in recommended.