Fruit bagging is one of the effective measures to improve fruit quality and increase economic efficiency. But if it is not done well, there will be some problems that will affect the bagging effect. Young fruit peeled off after 3 to 4 weeks after shedding. This is due to the fact that the fruit thinning is not done well before the bagging, the tree load is large, the ratio of the fruit to the fruit and the leaf to fruit ratio are unreasonable, and malnutrition is caused. Two to three weeks after bagging, it was found that some fruit rotted in the bag. This is due to premature bagging, due to high temperatures. When temperatures in excess of 28°C occur from late May to early June, the temperature inside the bag will exceed 30°C and cause burning of young fruit. The cause of the disease is due to the lack of timely injection of drugs before bagging, or due to inaccurate application of drugs. Irregular fruit found in the fall of the fruit of the fruit type is not correct, or even deformity. It is due to the lack of careful selection of fruit before bagging or the impact of the handle when bagging. Uneven coloration When harvesting, it was found that the fruit of the bag was unevenly colored. This is due to the poor quality of the paper bags. In order to prevent the above situation, the following methods can be taken: After 3 to 4 weeks after flowering, fruit thinning will begin, and large fruits will all retain the center fruit, so that the tree load is reasonable, and the fruit thinning rate of Marshal, Fuji, Golden Crown and other varieties should be adjusted. To 4 to 5:1, the ratio of leaf to fruit should be 50 to 70:1, and the malformed fruit should be eliminated. The fruit of the tip of the middle and long fruiting branches is generally not suitable for bagging. Spray before spraying bag must be careful. The bagging time is preferably 3 to 5 weeks after flowering and when the temperature is stable at 22°C to 26°C. For varieties with heavier physiological fruit drop, the bagging time should be delayed until after the fruit drop in June. When bagging, select a high quality bag and carefully handle it to avoid mechanical damage. About 20 days before harvesting, the outer paper bag is released first, and the inner paper bag is removed within 5 to 7 days. Removing the bag prematurely or too late is not good for coloring the fruit.
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