Hi all! After battling Bacterial Blight on my lilacs, they now have dark spots on them . I don't know if its mildew or what. The lighter spots on the leaves I think is residue from the Southern AG Copper Fungicide I'm using to help control blight. Could I be mistaken and it powdery mildew? Any help would be most appreciated! My Lilacs are my favorite shrubs but also seem to be the ones that cause me the most grief! LOL! I have four shrubs and only one bloomed this year, possibly from cutting back last year due to the blight. I'd love to be able to salvage them, but I really don't know whats wrong with it. I'm not sure what kind these are.... I think it is the Old Fashioned.