I am a MG intern trying to learn more about bugs and diseases. What are these...

Asked July 19, 2015, 6:50 PM EDT

I am a MG intern trying to learn more about bugs and diseases. What are these spots on my cucumber plants? Spots were not progressive and did not interfere with plant growth or fruiting. Appeared in early July before flowering. Garden gets 7-8 hours sun a day. Everything growing great including cukes, eggplants and tomatoes. My guess: Target leaf spot or alternaria. Thanks for your help.

Baltimore Maryland cucumbers vegetables phytotoxicity

1 Response

Based on your photo and description this does not look like a disease on the cucumber. This looks like a type of physiological issue or phytotoxicity. May be weather related, fertilizer burn, sun scald, etc. No control is necessary. Monitor your plants and send us additional photos if symptoms progress.
mh