In recent years an increasing number of wineries have asked growers to allow fruit to remain on the vine beyond the time of conventional ripeness. This period of extended ripening, commonly called "hang time," presumably results in an abundance of desirable flavors and aromas, or at least a minimum of undesirable flavors and aromas. At the same time, berries often shrivel, resulting in decreased fruit yields. In addition, the fruit becomes increasingly susceptible to mechanical damage and diseas...