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Leaf rot on lilac #878861

Asked July 26, 2024, 10:46 AM EDT

Our overgrown lilac is experiencing severe leaf rot. Besides cutting it back what course of action should we follow?

Carver County Minnesota

Expert Response

It is likely Lilac blight which is very prevalent this year. See the details and management on these web pages.
https://extension.umn.edu/plant-diseases/leaf-spot-diseases-trees-and-shrubs#leaf-spots-and-shoot-blight-or-canker-1156510
https://extension.oregonstate.edu/news/how-recognize-treat-avoid-lilac-bacterial-blight
https://yardandgarden.extension.iastate.edu/encyclopedia/lilac-bacterial-blight

Linda G Tenneson, Benton County Extension Master Gardener & Tree Care Advisor Replied July 26, 2024, 2:59 PM EDT

This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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