Cucumber leaves getting yellow spots

Virginia Beach, VA

Our cucumber plants are growing good has alot of baby cucumbers and bunches of flowers............but suddenly they have yellow spots all over the leaves. I have grown cucks for many yrs. and never seen this ALL HELP WELCOME I dont want to loose them now

Thumbnail by Mredd00
Contra Costa County, CA(Zone 9b)

Are there pests on the under side of the leaves?

Virginia Beach, VA

NOPE....that was the first thing I looked for. It dont look like a fungui either

Fort Worth, TX(Zone 8a)

Looks like Downy Mildew. Do you water from the top?

Sedro Woolley, WA(Zone 8b)

Same thing happened to mine. I didn't find anything about downy mildew when I was researching, but it looks like that is what I had. I thought it was magnesium deficency. We have had all of this rain, and being down south it's so humid too. I tried Epsom Salt, which helped a little but by then it was too late it was so rapid forming. I only got two Dragon's Egg cucumbers there were others forming but they dried up.

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