With the improvement of people’s living standards, the concept of consumption of green products and organic food has become fashionable. Grape ear bagging technology can significantly improve the appearance of fruit quality, improve fruit flavor, improve fruit quality. It can effectively prevent disease and bird damage, sunburn, and avoid contamination of fruits with pesticide residues. At the same time, it can also meet the market demand for high-end fruit. Bagging cultivation has become an important technology for producing high-quality and high-grade fruits.
First, the choice of paper bag type
The selection of grape bagging paper bags should be based on the condition of the tree, the production target and the economic ability. Therefore, we should choose a reliable quality domestic pulp paper bag, plastic film bag and homemade newspaper bag as little or as little as possible.
Second, bagging period
Bagging time. Generally during the period of fruit bagging in the middle of June, the bagging period is preferably in the berry expansion period, at which time fruit set-up is basically stable and virus infection is light. If it is too late to bag, at the latest before the second expansion of berries. Bagging work hours should be sunny from 9 to 11 o'clock and from 2 to 6 o'clock in the afternoon.
Third, bagging operation technology
Before putting the bagging, put the whole bag of fruit bags in a damp place to make it moist and flexible. After selecting the young ears, carefully remove the debris attached to the young ears, hold the paper bag with your left hand, open the bag with your right hand, or use Open the mouth and open the bag so that the bag body will bulge. Open the vent holes in the two corners of the bag. Open the mouth 2-3cm below the mouth of the bag. Put the mouth upwards or downwards, insert the ear, and put on the ear. The stalk is placed on the open base of the bag (do not put the leaves and twigs into the bag), and then the bag opening is folded in a “folding†manner from both sides of the bag mouth, and the tying wire is tightly attached to the bag mouth at the folding position. Tear open the connection from the connection point and turn the strap back 90 degrees. Rotate the pocket along the mouth of the bag for 1 week, so that the young ears are in the center of the bag body and are hung in the bag to prevent the bag body from rubbing the fruit surface. Do not wrap the binding thread around the handle, and always use the force direction when bagging. In order to avoid pulling out the young ears, try harder and lighter, try not to touch the young ears, and tighten the bag mouth to prevent pests from crawling into the bag to harm the ear and prevent the paper bag from being blown off by the wind. In addition, the bare fruit on the upper part of the crown and on the back of the backbone should be set in order to avoid the occurrence of sunburn. The average number of sacks per acre in a vineyard is about 1,600.
Fourth, picking time
The period of picking bags varies greatly depending on the type of bag and variety, and it is not possible to color bags of blue grapes. Red, purple black and black varieties should be bagged 10-15 days before harvesting. To promote berry coloring. The appropriate time for bag removal in the day is from 9 a.m. to 11 p.m. and from 3 p.m. to 5 p.m. In the morning, with the exception of the paper bags on the south side, the strongest time of daylight should be avoided to avoid fruit scorching. Picking time is too early or too late to reach the expected effect of bagging, premature picking, dark fruit surface, poor smoothness; too late to remove the bag, the fruit surface color is light, storage fading.
Fifth, supporting management after bagging grapes.
Grape bagging is only a part of the production of high-grade fruit, and corresponding measures are in place to ensure the production of high-quality fruit. In the management, we must re-apply farmyard fertilizers, use less chemical fertilizers, control nitrogenous fertilizers, and re-apply phosphorus and potash fertilizers; pay attention to watering and pay attention to drainage, and we must do a good job of summer shearing. After leaving new shoots and leaves, cut off excess. Branches and leaves for good ventilation. Pay attention to pest control and protect new shoots and leaves.
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