Knowledgebase

White Spots on Cucumber Leaves #834487

Asked June 08, 2023, 8:53 AM EDT

Are you able to tell me what the white spots on my cucumber leaves are? If so, do you have a recommended course of action? As you can see in the picture, the cucumber plants share a 4x4 raised box with 2 tomato plants. Is there a chance whatever it is could spread to them? If so, do you suggest removing the cucumber plants? Thank You, Alan

Baltimore County Maryland

Expert Response

Hi- we see a very small amount of discolored (white) leaf tissue that does not appear to be powdery mildew or any other disease. 
Cucumber problem key:
https://extension.umd.edu/resource/key-common-problems-cucumbers

Please send additional photos if symptoms progress or worsen. 

There is no danger to your tomato plants.
Jon 
Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied June 08, 2023, 12:59 PM EDT

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