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
Are there pests on the under side of the leaves?
NOPE....that was the first thing I looked for. It dont look like a fungui either
Looks like Downy Mildew. Do you water from the top?
http://www.extension.umn.edu/distribution/horticulture/DG1172-12.html
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.
