Dave, It seems that your grapes are not maturing properly for some reason .If the problem is a fungus or any other disease carried by insects, it may be too late to save your present crop. Are there other symptoms? say, powdery leaves or dried leaves, or too much water or lack of water, Wat about fertilizers applied,when and what ratios etc. I understand that crop failure means raisons or excellent wine from mutated grapes . This might be a valuable lesson if you like to experiment. I'd be curious if you discover something interesting. If so let me know. Bob
