Before bagging, put the whole bundle of fruit bags in a damp place to make them moist and elastic; After picking the ears, carefully remove the impurities on the ears, hold the paper bag with your left hand, open the bag mouth with your right hand, or blow it open with your mouth to make the bag mouth bulge, so that the air-permeable and waterproof holes at the two corners of the bag bottom are opened, and hold the bag mouth 2 ~ 3 cm below, and insert the bag mouth upward into the ear. Then, the mouth of the bag is folded in the form of "folding fan" from the incisions on both sides of the mouth, and the binding line is tied at the folded position, and the binding line is torn from the connection point above the mouth of the bag, so that the binding line is turned over by 90 degrees, and the mouth of the bag is tied by rotating 1 time along the mouth of the bag, so that the ear of the fruit is in the center of the bag and hung in the bag to prevent the bag from rubbing the fruit surface. Don't wrap the tie wire around the trunnion. When bagging, the direction of force should always be upward to avoid breaking the ear. The force should be light, try not to touch the ear, and the mouth of the bag should be tied tightly to prevent pests from climbing into the bag and hurting the ear, and to prevent the paper bag from being blown off by the wind. In short, early bagging is better than late bagging. Some people say that early bagging will affect the expansion of the first 1 grain, but practice has proved that the physiological fruit drop just ends after flowering, and the temperature is low, so bagging is beneficial to the growth of the ear in the bag, so early bagging is better than late bagging. After the physiological fruit drop of grapes, when the fruit grows to the size of beans, it is necessary to thin the fruit, cut the ear and spray medicine. When bagging, try to avoid touching and rubbing your ears with your hands. Before bagging the grapes, spray the grapes with drugs, so that the drugs can easily penetrate, completely remove the germs on the grapes, keep the grapes in a sterile environment after bagging, and reduce the incidence rate in the later period. Recommended agents: botrytis cinerea preventives (Kaiser, Jun Si Qi, Xerox, chlorpheniramine, myclobutanil)+anthracnose preventives, white rot preventives (Shigao, penconazole, Tebuconazole, benzoxazole)+protectants (Kairun, Amista, An Tai Sen, Fluroxypyr, trifloxystrobin)+calcium (calcium sugar alcohol); Precautions:

1. Try to choose water agent, emulsion in water and suspending agent, and use less water to disperse granules and wettable powder;

2. After spraying the medicine, shake the wire to let the medicine on the fruit drip down to prevent the formation of medicine spots.