There is also a rotten fruit in the bag of grapes. The problem is that the bagging technique is not enough. There are mainly the following reasons:
â—† Bagging time is not right, and it should not be too early, usually in the fruit expansion period. In the evening, some grapes have been infected with germs, and it is difficult to remove all the sprays. The bacteria still multiply in the bag. According to the test, when the bag was inflated, the rate of rotten fruit was only 2.5%, and bagging was 20 days later. The rate of rotten fruit was 17.8%.
â—† The bagging method is not correct. Some people say that bagging grapes should be finished within 6 days after spraying. Actually, it is not. Practice has proved that after spraying the grapes, the liquid should be dried and the bag should be grasped. It is best to finish the same day. If there is no rain on the day, there will be no dew at night, and it can be finished in two days. The planting area is large, and it can be divided into blocks. According to labor and bagging speed, the number of bags in a day can be calculated, and how many bags can be put, how much medicine is sprayed. Do not wait for the spray to dry after the spray, so it is easy to cause rotten fruit.
â—†There is a problem in the fight. The timing of the fight is very important. You can't fight the medicine when there is dew. You can't fight the medicine when it is exposed to strong sunlight at noon. It is best to fight drugs from 7:00 am to 10:00 am, avoid dew and avoid direct sunlight; fight drugs should be even, do not spray too much, and can not leak. The grapes on the fence should be sprayed on both sides, and the scaffolding should be sprayed on both sides of the ear. The nozzle of the sprayer should be finely rotated to facilitate fine and uniform spray.
â—† Paper bag quality problems Grape bagging has many benefits, anti-disease, anti-pollution, anti-bird damage, pest control, can make grape production and quality. Buy standard wood pulp paper bags, which are expensive but safe and insured.
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