As some may know, Kathryn and I have struggled to organically control mildew in our vineyard, in large part because neighboring vineyards are not mildew controlled. This year we had great success (finally) with mildew control using the following organic tank mix. It combines anti-mildew bacteria with sulfur or stylet oil for improved performance, and is relatively inexpensive as well:

Sulfur, Cease or Sonata, spreader/sticker (I added a bit of Regalia as well but that probably isn’t necessary)

Stylet oil can be substituted for sulfur, just remember to allow 2 weeks interval between oil and sulfur

Here is more info on this tank mix. It apparently is as effective as chemical based mildew products.

https://defeattheresistance.com/wp-content/uploads/2018/04/Sonata-Sulfur-DF-Res-Mgmt-flyer-v3.pdf