I think this is black rot but wanted to confirm. The client says they have a very old concord grape vine and 1 newer Marquette and 1 newer Frontenac vines. They described it as the vines get plenty of leaves and are loaded with grapes early. Then the leaves start getting Orange spots and the grapes start to turn brown/black and shrivel up. I was also curious about recommendations for home gardeners. I am not able to locate the publication Grape Pest Management for Home Gardeners that is mentioned in Growing Grapes In Wisconsin. Should I just use the Midwest Fruit Pest Management for Commercial Growers?