- 1). Check your elderberry's leaves to determine if it has verticillium dahliae, a type of fungus. Verticillium wilt turns leaves yellow and causes them to roll inward. If infected, treat it with metam sodium, a pesticide.
- 2). Look for white patches on the elderberry's leaves. This indicates powdery mildew. Eventually, some of the spores may turn yellow and cause the elderberry to lose leaves. If your elderberry has this, prune away the heavily infected areas. Spray a heavy stream of water on the leaves (both sides). This should help get rid of the spores. Dry the leaves if the weather conditions won't dry them quickly.
- 3). Examine your elderberry's bark for discoloration. Cankers will cause discoloration and will kill the affected twigs and branches. If you notice tiny dots of pink or black fungus, remove any affected twigs or branches and burn them. When cutting a branch, cut about 3 inches below the infected area.
- 4). Look for irregular yellow splotches on the leaves. This is tomato ringspot virus. It causes the leaves to distort by puckering or bending. If positive for the virus, fumigate.
- Advertisement -
- Advertisement -