Ear bagging is an important technology for the production of high-quality, high-grade fruit, and it is also an important technical measure for the production of pollution-free green fruits. After the bagging, the color of the ear is bright, smooth and pollution-free, which greatly improves the market competitiveness. The selling price of the bagging grape market is 20%-50% higher than that of the bagging grape market.
1, the purpose of bagging: grape bagging, can reduce the fruit growth period pests and birds, reduce sunburn, reduce pesticide and dust pollution, improve fruit surface finish; grape bagging can improve the fruit growth micro environment, the fruit Uniform coloration, bright color, delicate skin, improved fruit flavor, greatly improve the quality of fruit and improve its storage.
2. The choice of bagging: The selection of fruit bags should be based on the influence of the microenvironment on the appearance and intrinsic quality of the fruit. According to the varieties, it has the characteristics of strong weather resistance, good air permeability, high transparency, high hydrophobicity, and antibacterial properties. Paper bag. Newspapers and other fruit bags made of poor hydrophobicity, poor tensile strength, high breakage rate, easy to breed fruit diseases; non-woven fabric is good but easy to produce sunburn. In the current production, special grape bags combined with plastic films and special papers are the best and can be used for different requirements.
3, bagging time: bagging time also affects the bagging effect of the morning and evening, set early is not conducive to thinning the fruit, set the late disease infestation ear, if the bagging is too late, in mid-June, easy to infect with the consequences of ear Germs, especially white rot, anthrax, acid rot, gray mold, etc. Generally, the bagging is carried out 15-20 days after the fruit set, that is, when the grains grow to the size of the beans, they are bagged immediately after the pulverization and the whole ear. After a sudden sunny day after rainy weather, don't immediately bag it because it will make it worse. After a day or two, the fruit is slightly adapted to the high temperature and then bagged. Bagging time is preferably before 10 o'clock in the morning or after 4 o'clock in the afternoon, which can reduce sunburn.
4. Bagging: After bagging, before the harvest, the berries are mainly colored. In the case of insufficient sunshine and bad color, the paper bag must be removed 2-3 weeks before the picking to improve the coloring effect (the blue grape can not go to the bag) . After the bags are removed, the ears are rotated one or two times according to the condition of the ears, so that the fruits and fruit bunches are colored uniformly.
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