At the end of the grape growing period, the cyan grapes can be removed from the bag. Other varieties should be removed from the bag 10-15 days before harvest. For the quality of the paper bag, the transparency is strong, and the berries are well colored in the bag, the bag can be removed at the time of harvesting. The main purpose of the bag is to color the berries before harvesting. After removing the bag, the old leaves, diseased leaves and residual leaves around the ears are removed, the excess shoots and the secondary shoots are cut off, and the leaves within 20 cm of the ears are removed. After the bag is taken, the fruit surface is sprayed with a new high-fat film to avoid direct fruit surface. Exposure to sunlight can cause sunburn and increase fruit coloration.
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