Wilting Leaves and Dead Branches on Lilac Bushes

Asked July 16, 2020, 6:06 PM EDT

We are starting to see wilting leaves and dead branches on our lilac bushes. The bushes are over 30 years old and we have never seen this happen before. Please suggest possible causes. Thx Dan

Washington County Minnesota

1 Response

My guess would be bacterial blight of lilac. See here:

There is no treatment except good sanitation to prevent a reemergence next spring.

To verify my guess, look at this diagnostic page:

You could also submit a sample to the Plant Disease Clinic: