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Lilac Bush Leaves are Brown #877609

Asked July 17, 2024, 11:59 AM EDT

What is the best way to treat this condition? I love this bush and for the 8 years that I have lived in my house it has been very health.

Hennepin County Minnesota

Expert Response

Good Morning Linda, 

Thank you for contacting the U of M Extension Service. 

Please click on the following link from the U of M Extension Yard and Garden website: 

https://extension.umn.edu/plant-diseases/leaf-spot-diseases-trees-and-shrubs#bacterial-leaf-spots-and-blight-1156513

If you scroll down to bacterial blight, it discusses lilacs. 

This also refers to the "managing leaf spot diseases" above. With the cool and wet weather we've had this spring, many lilacs are experiencing blight. 

Good Luck!

Maureen Graber Replied July 18, 2024, 8:42 AM EDT

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