What is the reason for rotten ears of grapes after picking bags?

Grape bagging is a technology to prevent and reduce fruit diseases, at the same time, it can also improve the quality of grapes and increase commodity value. Many fruit growers think that it is appropriate to keep quality and increase production cheaply. However, there are also many fruit growers who react to the phenomenon of rotten ears after picking bags of grapes, which makes many fruit farmers wonder what is the reason for the rotten ears of orchids after picking bags. Let's take a look.

1. Improper bagging time

Grapes are more particular about the time of bagging, generally speaking, it is appropriate to be early rather than late, bagging time is generally chosen in the expansion period, bagging time is late, at this time some fruits have been infected with germs, spray is difficult to eradicate, bagging will still reproduce in the bag, harm the fruit. And according to experiments. Bagging during the expansion period, the rotten fruit rate of grapes is only 2.5%, while bagging 20 days later, the rotten fruit rate is 17.8%, so we must grasp the bagging time of grapes.

2. The bagging method is not right.

The wrong bagging time can also lead to rotten ears of grapes after bagging, and some grape bagging is usually done within 6 days after spraying, but this is a mistake. Time proves that after spraying the grapes, you should wait for the solution to dry and bag it tightly. it is best to finish it on the same day. If there is no rain and no dew at night, you can finish it within two days. If the planting area is large, you can bag it in pieces, and according to your own reality, you can spray as much medicine as you expect to cover in a day.

3. there is a problem with the administration of medicine.

In the bag spraying time is not right, medication can not be given when there is dew, can not be hit in the midday bright light and strong wind weather, this will lead to the effect of medication worse, but also may be counterproductive. The best time to give medicine is from 7 to 10:00, to avoid periods of dew and strong light, to be uniform, not to spray more and leak spray. Hedgerow grapes should be sprayed on both sides, scaffolding should also be sprayed on both sides of the ear, such as azoxystrobin, benzoate, etc., do not use fake medicine. The spray head of the sprayer should choose a fine spin piece, which is beneficial to the fine and uniform spray.

4. Paper bag problem

The advantages of grape bagging are disease prevention, pollution prevention, bird pest prevention and pest prevention, as well as improving the yield and quality of grapes and buying a good price. But the paper bags used by bagging are also more important. Paper bags produced by some informal manufacturers with low-quality paper and paper bags made by newspapers, paper bags that have been used once will cause rotten fruit in the bags. We must keep in mind that we must buy standard qualified wood pulp paper bags. Although the price is high, it is safe and safe.

The above is the introduction of the rotten ear after picking the grape bag. I hope it can help you. If you want to know more about it, please pay attention to us.