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Ornamental tree apple scab treatment #927407

Asked April 03, 2026, 10:19 AM EDT

Hello, I have crabapple (non fruit) tree in my back yard. I have noticed this tree infected with apple sacb. I have been told to treet during springtime when tree start leaves. I saw few fungicide name on your webpage. Can you please let me know which product i can buy to spray on my tree. I live in Illinois DuPage county.

Aitkin County Minnesota

Expert Response

Thank you for reaching out.

I am going to refer you to the extension office for good practices for apple scab.

Please go to extension.umn.edu and search for apple scab.  It will give you practices to follow all year as well as specific fungicides to use and how to use them.  
you can also go to extension.illinois.edu and search for apple scab.  I’m not sure of what can be done in Illinois, although I imagine they’re pretty muc( the same.

Good luck!

Deb Kroon Replied April 03, 2026, 2:36 PM EDT

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