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Brown spots on potato leaves #933401

Asked May 29, 2026, 7:59 AM EDT

My potato plants were doing very well until the recent drenching rains over the last two weeks. Now, they are showing brown spots as pictured. The lowest leaves are also turning yellow and dropping. What might be causing the brown spots, and if it's some sort of disease, should I trim away affected foliage to help reduce spread?

Hamilton County Ohio

Expert Response

Good morning,
I'm not sure.  I just emailed your question & photo to a friend who's a plant pathologist.  I'll get back to you with more information.
Barb
Barb Replied May 29, 2026, 8:35 AM EDT

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