In the past, grape growers have mistaken any shrivel in their fruit for grape berry shrivel, also known as sour shrivel, says Washington State University’s Dr. Bhaskar Bondada. In a panic, some were needlessly thinning clusters to remove what they thought were berries afflicted with sour shrivel. It’s important to know the difference between shrivels because fruit from some types can still be made into wine, but grapes with sour shrivel can’t. To help growers identify grape shrivels, Bondada and his colleagues have developed diagnostic keys for various ripening disorders in the form of a poster with photos to provide […]