There are no grapes on the vines so I don't have any berry dammage but I...
There are no grapes on the vines so I don't have any berry dammage but I can't tell if this is black spot or leaf rust or what. If it is leaf rust do I have to spray the vines before they go dormant for the season to prevent damage in the spring to buds?
I am not sure if you meant to attach a picture, but it did not come through. A picture would really help identify the problem.
Black rot (Guignardia bidwellii f. muscadinii) causes a circular brown leaf spot and tends to hit young fast growing leaves. Occasionally, lesions occur on the young stems and tendrils. To treat this you will want to spray with a fungicide like copper in the spring when the shoots are 2-4" tall.
This is information about how to identify grape rust mites and how to control them:
General information about grape diseases: