Fact Sheets

Lilac: Bacterial blight categories: Lilac Lilac Diseases Ornamentals Shrubs revision date: 2023-02-09 12:00 Lilac bacterial blight (1)Photo by: J.R. Glass Biology Bacterial blight starts as brown spots on leaves and stems in the early spring. These spots become black with age and cause death of leaves and young shoots, which may bend over at the […]

Lilac: Powdery mildew categories: Lilac Lilac Diseases Ornamentals Shrubs revision date: 2023-02-09 12:00 Powdery mildew on lilacPhoto by: C.R. Foss Biology Powdery mildew is a fungal disease of the leaves. On lilac, it shows typical powdery gray-white growth on the upper leaf surface. Powdery mildew usually occurs fairly late in the season, and does relatively […]