Answer: First of all, I wonder if the "mildew-like film" on the fruit was the natural "bloom" that grapes get. If the foliage wasn't affected (look for a gray/white, powdery coating on the leaves), then mildew probably isn't a problem.<br><br>There are a few reasons to explain why your grapes were small. Have you been pruning the vines each year? Vines can only support a certain size crop; beyond that fruit size may be smaller. Also, they need plenty of water throughout the summer. And finally, they need to be fertilized regularly. <br><br>You might want to contact your local Cooperative Extension office to inquire about publications on growing grapes in your region. Their number is 213/744-4854.
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