Where in the world are you?

What temperatures have you been having?

How much rain has been falling there?

When, time of day, were these plants sprayed?

What is "green cure for mildew"?

kimmq is kimmsr

I'm in Connecticut. Its not a lack of water for sure. Green cure is an anti fungal. It's actually mostly potassium bicarbonate. It's been in the 80s so I'm thinking that's the problem. I just want to be sure because of its a problem I'll replace the soil in my raised bed.

Sorry fungicide is the more garden appropriate term lol

Powdery Mildew has nothing to do with the soil, so there is no good reason to replace that. There are several different species of fungi that are Powdery Mildew and the spores that cause it all float around in the air. While common gardening myths say that high temperatures and humidity promote PM on plants that is not necessarily true and having wet leaves is not a cause either, in fact wetting plant leaves can wash the spores off. Perhaps this article from Growing a Greener World might be of some help.

http://www.growingagreenerworld.com/controlling-or-eliminating-powdery-mildew/

kimmq is kimmsr

The powdery mildew was a separate issue all together. I was just curious if those leaves looked like tomato blight, or more likely high temps in conjunction with spraying an oil base product on the leaves. I think I'm ok thought. Due to the timing I'm pretty sure that's all it was. On a high note though the combination does appear to have eliminated the pm on my squash very quickly.