Garden Pests and Diseases: What's wrong with my grapes?, 1 by hczone6

hczone6 wrote:
This vine has been in the ground about 4 years. Every spring it makes great foliage and the fruit comes along nicely. I think I'm going to get good grapes and then it happens. The grapes get about the size of peas and then they start to turn brown and shrivel up until they drop off. The leaves have some brown spots too. See photos. I don't have pictures of the grapes in the stage I mentioned. This is from today.

Cincinnati OH / Northern KY area