Problem with lilacs

Asked July 29, 2020, 9:45 AM EDT

These very old lilacs looked fine this spring but look really bad now. Really don’t match photos on site. No yellow halos on leaves.

Washington County Minnesota

1 Response

We can't diagnose the problem by viewing the photos. However, based upon what we can see we think the lilac may have been affected by bacterial blight. Compare symptoms here:

For a certain diagnosis, please send samples of affected leaves and twigs to the University of Minnesota Plant Disease Clinic: