Since 2020 my grape vines have had a rusty spotting on the leaves that eventually turns into a white powdery mildew that dehydrates the fruit prior to harvest. I have cut away the infected areas late fall and prior to first budding in the spring I have applied Bonide's all seasons horticultural & dormant spray oil to all the vines. I Also have been using Ferti-Lome's broad-spectrum fungicide several times a month. This seems to have slowed, but not stop this issue. Attached are pics of the affected vines and leaves I just removed and a pic showing some of the green fruit that is already starting to show signs dehydration.