This is most unusual. I came out the other day, and one of my Vidal Blanc vines that survived the winter suddenly started wilting. It is in a row of other Vidal. All of the vines suffered severe bud loss from the -38 F night we had, but the ones that survived are looking healthy with minimum disease on the shoots. Our Spring and Summer this far has been incredibly wet and cool. I'd understand the sudden symptoms to be weather related if all of the other Vidal vines in the row were suffering the same fate. Instead it is just a single vine. The vine is a grafted vine on 101-14 rootstock. The trunk and graft appear no worse for wear, and it is only yesterday that the symptoms manifested. Anyone seen this before? Any ideas what it is? Are the other nearby vines in danger? Treatment suggestions?