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Cucumber leaf spots #867455

Asked May 07, 2024, 3:26 PM EDT

I started some Chinese cucumbers from seed indoors. I just noticed these spots. What are they? What should I do about them? (Please let me know if the picture doesn't come through.) Thank you.

Wright County Minnesota

Expert Response

I can't diagnose a disease from a photo, but my guess would be angular leaf spot, a fairly common bacterial infection on cucumbers.  It is passed on in seeds and thrives in susceptible varieties.  It may not be a problem if you are careful with your watering practices, and there is no "treatment".  Read here:
https://extension.umn.edu/disease-management/angular-leaf-spot
https://yardandgarden.extension.iastate.edu/encyclopedia/angular-leaf-spot
Dennis in St. Louis Park Replied May 07, 2024, 4:42 PM EDT

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