This will treat mummy berry disease.
Yes, it may help.
No, this will not work.
Hi bluefish. According to the description from the Manufacturer, the black rot on grapes can be treated using the Procidic Batericide Concentrate. This will not repair any damage done to the grapes but it well be effective in treating the black rot on or grapes. For best results, pull the bad grapes and spray the remaining ones as directed. Please let us know if we can be of further assistance. Rick_HD_OC
This prevents Anthracnose, Apple Scab, Bacterial Canker, Bacterial Leaf Spot, Bacterial Wilt,Black Rot, Blight, Brown Rot, Downy Mildew, Fusarium Wilt ,Gray Leaf Spot, Gray Mold, Late Blight, Leaf Streak, Mummy Berry, Powdery Mildew, Scab, and Southern Blight.