I started spraying with nutrient dense amendments about 10 years ago. I was also doing a raw milk spray for powdery mildew. My helper friend was the one who actually did it as the backpack sprayer weighed 40# full.

This year AEA came out with Pinion for powdery mildew, so I decided to try that as the milk was an on again off again thing. Tom has been doing the spraying for the last 2 years as my helper friend can't do it any more.

And the Pinion appears to have been a game changer. It's made with cinnamon oil and that sort of thing, not really a fungicide but something that changes the composition of microbes on the leaf surface making it inhospitable to fungi. It also is absorbed into the leaf and changes up the workings inside the leaf, making it less appetizing for pests.