Please see the article in this link about the risk of 17-year cicada risks for this year. Looks like many counties east of Blue Ridge Mountains are in high risk zone. They lay eggs on branches (including grape canes), and young tender branches are more susceptible. If you have a young vineyard (1-2 years old) in the high risk zone, you may want to consider to take an action to protect your vines (grow-tubes, netting, extra shoots, etc). Please see Doug's article (about 2004 outbreak) for more details. Please consult with your local extension agents about the risk of your region.
Grape Disease Management Tips from Mizuho Nita (Grape Pathologist at Virginia Tech)