On Thu, 21 Aug 2003 04:37:00 GMT, Hombre opined:


I've heard that a part milk, part water solution works well. Anyone else?

Hombre

Yes, one part milk to 6 parts water is what I've used. It does work. The
lactic acid in the milk changes the pH of the leaf surface, making it
inhospitable to the powdery mildew, thus killing it. Powdered milk can be used,
and I've heard everything from fresh skim, to whole milk works as well.

V