Beginner Gardening: Can anyone diagnose these plants?, 5 by thartin

thartin wrote:
Greetings, I have a few winter squash and pumpkin plants that have some type of problem and I\'m not sure what\'s going on. Everything looked green and healthy, but then we got very heavy rain for a week and the garden was essentially flooded. My soil is fairly dense and holds water (we live in an area with a lot of clay).

Based on my research, it looks like powdery mildew? Is that correct? I have a hard time distinguishing between downy and powdery mildew. Actually, could it be both?

Any help anyone provides would be greatly appreciated.