After bagging, the yield of grapes is stable, quality is improved, and benefits are doubled. According to the grape sales situation, red grapes, royal autumn, and Crimson grapes are generally about RMB 3 per kilogram without bagging, and the price per kilogram of bagging is more than 6 yuan.
1. Bagging time. It is best to bag before the first swell of berries. At this point the fruit set is basically stable and the virus is lightly dripping. If it is too late to bag, the bag is bagged before the second expansion of the berry.
2. Preparation before bagging. Remove the sick, deformed fruit and too small ear, spray a bactericidal drug (compound carbendazim, thiophanate-methyl, and mancozebite) to the whole garden. The spray must be uniform, avoid leakage.
3. Bagging method. The first end of the paper bag is immersed in water 5-6 cm, wetted, so that the end of the paper bag is soft and easy to be fastened. Then open the bag mouth, put the ear into the bag from the bottom upward, and then shrink the bag mouth from both sides together, focus on the handle (to strive for less bare fruit handle), with the small wire on the bag Keep your mouth tight. Iron wire stays above the paper bag 1 to 1.5 cm long. Note that all ears should be bagged within two days after spraying, and it is advisable to bag at any time after the liquid is dry. If the interval is too long, the ear is susceptible to disease and it will rotten in the bag. When bagging, try to avoid touching and rubbing the ears with your hands.
4. Management after bagging. After bagging, we must focus on the control of pests and diseases of new shoots and leaves. Particular attention should be paid to the control of black pox, downy mildew, white rot and anthrax.
5. Bag solution time. For blue grapes, bag coloring is not required; red, purple black and black varieties should be bagged 10 to 15 days before harvest. For bags with good quality, high light transmittance, and good coloring of berries in the bag, they can be unwrapped at harvest time. To prevent bird, insect damage and air pollution, do not remove the fruit bag at one time. Open the bottom so that the entire paper bag is held up in the form of an umbrella, which will be fully unlocked when it is harvested. Good paper bags can be stored and used again after disinfection the next year.
6. Bag management. The period between the bag unsolved and the time before harvesting is the coloring period of the berries. Therefore, the most important task after bag unpacking is to remove the old and sick leaves around the ear. When cleaning, leave some of it as shade for the ears to prevent sunburn.
7. Harvesting and packaging. This is particularly important for the harvest of one-year labor. To fully display the color of the berries after harvesting, gently handle them, avoid touching the berries as much as possible, classify them in different varieties and grades, and prevent them from being squeezed during packing.
8. Fruit bag selection. Grape bagging has a history of more than 100 years in Japan, and it has been in South Korea for more than 20 years. In recent years, China has only promoted grape bagging technology on a large scale, and some manufacturers of fruit bags do not have sufficient experience. Therefore, it is necessary to pay attention when selecting fruit bags.
9. Grape bagging after the matching management. Grape bagging is only a link in the production of high-grade fruit, and supporting measures to ensure the production of high-quality fruit. Due to space limitations, just a hint. To re-apply farmyard manure, less fertilizer, control nitrogen fertilizer, re-apply phosphate fertilizer, potash fertilizer; to a reasonable load, excessively high yield, generally 2000 ~ 2500 kilograms of per mu is appropriate; to pay attention to watering, but also pay attention to drainage; to engage After a good summer cut, leaving new shoots and leaves, cut off the excess branches and leaves, in order to facilitate air and light; pay attention to pest control, protection of new shoots and leaves.
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