Hi, I'm having same problem with the females yellowing and shriveling before blooming on a couple of my plants. I've been told it may be the heat.

As for the PM, I have that problem too. I've lost leaves but new ones grow in. My plants with PM are growing pumpkins, it seems successfully. I've been spraying with a fungicide once a week or after heavy rain. It doesn't cure it but it does control it. If you are uncomfortable with fungicide, I know some people spray and control PM with a milk or baking soda mixture. If you pick up a pump sprayer you make treating for PM a pretty quick job.

I would guess your females aren't getting pollinated.

I gave up battling the PM. A lot of effort for little reward. In your case though as you have it bad and don't have any fruit forming yet, it may be necessary.

Peter, the problem isn't them not getting pollinated, it's the flowers never even having a chance to open. Stephanie, I do hope it's the heat, although it hasn't even been the hot around here (Iowa).
Last year when my pumpkins had PM I tried the milk thing, but I don't think it worked. What concentration of milk is the best to use? I've heard 10%-40%.

Thank you both for taking the time to post!

I've heard 10%-30% which is a pretty big difference. I wish I could tell you I've used milk but I'm using a fungicide to control it. You have a pet tortoise, correct? Perhaps post on the pests & diseases forum and somebody there can probably give you the correct percentage.

Oh the flowers didn't even open...

I tried baking soda, immunox, copper, and daconil, with modest results at best with all of these. I didn't try the milk and some people swear by it so I would suggest trying that.