Knowledgebase
lilac leaf wilt ??/ #879017
Asked July 27, 2024, 2:21 PM EDT
Hennepin County Minnesota
Expert Response
https://extension.oregonstate.edu/news/how-recognize-treat-avoid-lilac-bacterial-blight
This web page describes several lilac conditions. Hard to determine which one you have based on picture.
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/lilac/leavesblotches.html