What does this look like? A white powdery dusty covering of the leaves is most likely Powdery Mildew which is mostly moved around in the air. Bacterial wilt presents more as the whole plant just falls apart, mimiced somewhat by the Squash Vine Borer.

"Mold stuff" could be anything.

Without more information, any replies are guesswork.

Dan

I get powdery mildew on my acorn & butternut every year, I just let the vine wilt with the squash on it, it doesn't affect the taste.

{{gwi:154306}}