Powdery Mildew

It's a l w a y s something! So said Rosanna Danna. Yes, my zucchini and crook neck squash leaves have powdery mildew. I sprayed at the first sight, but it's hard to get rid of. I just sprayed again tonight and cut off the really bad leaves. Amazingly enough, I still get a lot of good vegetables. It doesn't seem to affect them.