Grape bags also rotten fruit? These points are not done
The problem is that the bagging technology is not closed because the grapes are bagged and rotten. There are mainly the following reasons: 1. The bagging time is wrong. Relatively speaking, bagging should be early but not premature, generally during fruit enlargement. Set too late, some grapes have been infected with pathogens, spraying is difficult to eradicate all, germs still multiply in the bag. According to the experiment, the bagging rate during the expansion period was only 2.5% for the grapes, and 17.8% for the bagged bags in the late 20 days. 2. The bagging method is wrong. Some people say that bagging grapes should be done within 6 days after spraying, but it is not. Practice has proved that after the grape spray, it should wait for the liquid to dry, take care of bagging, the best set the same day, if there is no rain on the day, there is no dew at night, within two days can also be set. The planting area is large and can be divided into blocks. According to labor force, bagging speed, etc., the number of bags to be bagged each day can be calculated, how many bags can be set, and how much medicine can be sprayed. Do not spray the drug until the liquid is dry on the bag, so easy to cause rotten fruit. It should also be noted that when bagging, avoid touching the fruit by hand, and tighten the upper mouth to prevent leakage of rain. 3. There is a problem in fighting drugs. The timing of drug fights is very important. Do not fight drugs when there is dew, and do not fight drugs when the sun is shining at high light and when the wind is blowing. It is best to fight drugs from 7 am to 10 am, avoid dew, avoid direct sunlight, fight evenly, do not spray too much, and do not spray. Sheds must be sprayed on both sides of the fence, and shelving must be sprayed on both sides. The nozzle of the sprayer should be selected for fine rotation, which is beneficial to fine and uniform spraying. 4. Paper bag quality problems. Grape bagging has many advantages, such as preventing diseases, preventing pollution, preventing birds and pests, and preventing pests. It can ensure grape yield and ensure quality. Buy standard qualified wood pulp paper bags, expensive but safe and safe. Some paper bags produced by informal manufacturers with poor quality paper and paper bags made by newspapers have been used once. The paper bags used are likely to cause rot in the bags.
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