Powdery Mildew on Acorn Squash

With a little bit of internet research I’ve found out that my acorn squash plant has a bad case of powdery mildew. It looks like the whole plant is affected to some degree. I cut off the badly infected leaves yesterday but it’s quickly starting to spread to the remaining leaves.

I was looking at this list of homemade remedies (http://faq.gardenweb.com/faq/lists/organic/2002081329023823.html) and I think the apple cider vinegar fungicide sounds like the safest. I don’t want to use soap on something I will be eating. Any other ideas?

I’m also worried that the disease will spread to nearby plants. There are two zucchinis planted nearby. Does anyone know how quickly it can spread to other plants? Is it worth trying to save?

BTW, I think it would be a good idea to add more tags for various types of diseases.