what causes black spot on burning bush?
Burning Bush (Euonymus alatus) is very sensitive to heat and water conditions and, in spite of the marketing literature may be susceptible to some insect pests that compound its vulnerability. Several diseases can also affect burning bush plants, including cankers, fungal spots and powdery mildew. Verticillium wilt is a disease that often shows up with sudden die-back of one large branch, or 1/2 of the plant.