"BenGman" wrote in message
oups.com...
I have this white mold growing in patches on the top of my sqash
leaves. I think it might be caused by overwatering in the cold weather
(foggy) the San Francisco Bay Area has been experiencing, but i'm not
sure. Is my hunch correct or not? Thanks

You have powdery mildew. Spray the leaves with fungicide until they drip
every 7 days.