What should we pay attention to before and after apple bagging

  Apple bagging can significantly improve the appearance of fruit commodity quality, promote fruit coloration, is an advanced practical technology to produce high-grade commodity fruit, increase the income of fruit farmers. Bagging in high-quality orchards can obviously promote fruit coloring, increase fruit surface smoothness, reduce pests and diseases, reduce mechanical damage such as hail, reduce pesticide pollution and residues, and improve the commodity value of fruits. However, according to our investigation for many years, there are still many problems. Therefore, combined with the actual production, the fruit growers should be reminded to pay attention to apple bagging before and after.

  What should we pay attention to before and after Apple bagging?

1.pay attention to the timely spraying before bagging, pay attention to protect the leaves.

Bagging has the effect of preventing diseases and insects, but some diseases and insects have infected the fruit before bagging. If they are not eliminated, the infected pests will continue to harm the fruit in the bag and lose the significance of bagging. In this period, regular spraying of pesticides and fertilizers is necessary, which has a great effect on preventing diseases and insects, increasing fruit setting rate, increasing single fruit weight and preventing nutrient deficiency.
2. Pay attention to reasonable load.
Strict fruit thinning, set fruit 20-25 centimeters to leave a fruit, retain the center fruit, fruit stalk long, will be small fruit, flat fruit, Qizao fruit, Chaotian fruit, pest fruit, injured fruit thinning.
3. pay attention to scientific fertilization.
At the same time, attention should be paid to balanced fertilization, nitrogen control, phosphorus and potassium, especially potassium and phosphorus fertilizer in the middle and late stages, combined with foliar fertilizer spraying on trees, which is conducive to Fruit Coloration and sunburn prevention.
4. Pay attention to standardizing technology.
Non-standard operation technology in fruit bagging will result in low yield of bagged fruit. When bagging, the sealing should be strict to prevent pests from entering the bags to propagate harmful fruits, and to prevent medicines and rainwater from entering the bags to pollute the fruit surface. When bagging, do not make fruit bags close to young fruit, so as to avoid rough fruit surface, rust and sunburn.
5. Attention should be paid to the damage caused by the powder scale.
Concha mostly gathered in the calyx concave to suck fruit juice, resulting in small black spots, and covered with white wax powder. It can also drill into the bag through the stomata and the gap at the mouth of the bag. The damage occurred slightly in the first 1-2 years of bagging in the orchard, but the percentage of insects and fruits could reach more than 40% after bagging in successive years. Before bagging, spraying should be used to kill the powder scale of Kang. The mid-late May and mid-late July are the peak periods of the first and second generation nymphs respectively. At this time, timely prevention and control should be carried out, and attention should be paid to tightening the bag mouth when bagging.
6. Attention should be paid to supplementing calcium.
In recent years, many nutrition experts have studied that the effect of calcium on apple quality is far more important than that of nitrogen, phosphorus, potassium, magnesium and other elements. Therefore, calcium plays a decisive role in the quality of bagged apples. Before and after bagging, fruit trees should be sprayed with multiple calcium fertilizers to reduce the occurrence of physiological diseases such as bitter pox disease and water core disease.
7. pay attention to the selection of fruit bags.
The quality of fruit bags depends on the quality of paper bags and the processing technology. Correct selection of bags and good selection of bags are another key to the success of bagging.
8. Pay attention to the overall level of the orchard.
The apples produced in high-grade double-layer paper bags have bright colors and delicate peels, which sell at a high price. But not all orchards are suitable for high-grade paper bags. It is closely related to site conditions and management level. Orchards with high soil organic matter content, well managed and strong trees should be selected, and high-grade double-layer paper bags should be set. For secondary apple growing areas, especially orchards with serious pest and disease hazards, besides strengthening management, suitable single-layer bags or plastic film bags with good quality are suitable. They have low cost and great effect. They can also effectively improve the commodity rate of fruit and increase the economic benefits of orchards.
9. Attention should be paid to supporting technologies.
Inspection of pests and diseases in bags at any time; timely inspection of bag mouth bandaging; removal of withered yellow and extruded leaves. Spray highly effective fungicides 1-2 days before picking bags to prevent the infection of pathogens and the consequences of picking bags. After picking bags, lay silver reflective film in time, pick leaves and turn fruits in time.
10. Pay attention to timely and scientific harvesting.
The order of fruit picking is first up and then down, first outside and then inside. The skin of bagged fruit is thin and tender. In the process of harvesting and handling, the bagged fruit should be handled as carefully as possible, so as to reduce touching, pressing, stabbing and scratching. To harvest, while grading.