Cucumber leaves with mildew/mold?

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plantRN (Beth) L'ville, GA(Zone 7b) May 17, 2009

Hi all--this is my first year planting cucumbers from seed. My plants are growing like crazy, but I noticed that the lower, larger leaves on one plant have a white mildew type substance on them. I'm sure it is something common but I am not sure what to do about it. I do have Daconil--can I spray this on? Or, does the growth really matter in the big scheme of things (i.e., will the cucumbers still be safe to eat?, etc.). Any help will be greatly appreciated!

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Bodecoa Lafayette, TN(Zone 7b) May 18, 2009

Me too, only it's on my zucchini. Any words of wisdom?

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HoneybeeNC Charlotte, NC(Zone 7b) May 18, 2009

Might be Powdery Mildew - this is very common where summers are hot and humid. My mind is drawing a blank as to what will keep it away. A Google search should bring you lots of answers.

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stephanietx Fort Worth, TX(Zone 8a) May 18, 2009

You can sprinkle cornmeal on the ground under the leaves (horticultural cornmeal, not the regular stuff in your pantry) and you can also spray with a dilution of milk or hydrogen peroxide. I think that's right on the hydrogen peroxide. I sometimes cut off the affected leaves to allow more air circulation, too.

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Bodecoa Lafayette, TN(Zone 7b) May 19, 2009

Thanks! Appreciate it.

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plantRN (Beth) L'ville, GA(Zone 7b) May 19, 2009

Thank you, thank you! I'm sure it is powdery mildew and I think cutting the lower leaves will be just the right "medicine". Beth

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