I put a post in the other day where I sprayed with milk. I've done it a few times recently because the weather is shocking for downy mildew.
I think Juliet Henderson was right. Milk 10-20% kills downy mildew dead. When it's growing it looks fluffy and a little white on the back of the leaf. And a berry hit with downy looks like a furrball.
But with this milk spraying the grapes have got some grey on them, but not that rampant mildew growth. That grey I only ever saw at the end of the season, thick and ugly and the grapes were beyond redemption.
So perhaps milk works. It's gentle and organic I suppose (whatever that means). And the best thing for me, when I spray they smell reminds me of the days I'd work in a National Foods cheese plant.
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