Curative sprays for downy mildew on cucurbits
It's been a really good year for cucumbers and other cucurbits, which I attribute both to a lack of pests and an assiduous preventive spray program. But now I'm seeing signs of disease on the older vines, whereby I realize that nothing in my arsenal seems to be curative, only preventative.
The Google reveals an array of curative products for this situation, but none of them seem to be available to the home gardener. Wondering if there's something out there I don't know about yet.