Lilacs are a hardy plant that does well in an area with good drainage. They are susceptible to a few plant diseases including powerdy mildew, phytophtora blight, and gray mold.
You have a slew of them: Bacterial blight, bark splitting, cankers, Chlorosis, powdery mildew, sooty mold and winter injury, but this tree will do well once established.
Most common disease is blight,followed by mycroplasma, powdery mildew, which are all treatable. Verticillium wilt as well as a virus are non-treatable diseases and will kill the plant.
There are many types of lilac diseases. some are Blight,Mycoplasma,Powdery mildew,virues,wilt. These disease can cause major problems with more tenderfruits,flowers and vegetables.
Powdery Mildew is a common disease that appears in hot and humid weather. Apply a general purpose fungicide 2 or 3 times a week a part. The sooner the better.
