Apple bagging has the characteristics of promoting fruit red development, bright fruit surface, bright color, reducing pests and diseases, reducing pesticide residues, increasing commodity value, increasing economic benefits, etc. It is currently one of the main measures for producing high-grade and pollution-free apples. However, bagging in our country is relatively late, the technology is low, and many problems occur in production, which leads to the occurrence of many pests and diseases. Therefore, pest control is particularly important.
1. Bitter bitter disease: Bitter bite disease is a physiological disease caused by calcium deficiency in fruit. In the severe calcium deficiency of the film, calcium fertilizer should be added or sprayed two times 400 times amino acid calcium in 3 to 4 weeks after anthesis, which can significantly reduce the occurrence of bitter pit disease.
2. Rust disease: Rust disease is a viral disease. According to the investigation, the incidence of bagged fruits was more than 5%, and the incidence of severe strains was 96%. Therefore, red Fujitsu that is connected to Guoguang rootstock should avoid bagging.
5. Black spot rust: According to the survey, the occurrence of black spot rust is related to the quality of the paper bag, the permeability of the orchard, and the climatic conditions. The paper bag ventilation hole is not standardized or the orchard is closed, or the year when the rain is excessive occurs. Therefore, we should choose to regulate high quality fruit bags. At the same time, the orchard is properly pruned and aired.
4. Onset of sunburn disease: The occurrence of sunburn disease in apple bagging is related to climate, species, tree vigor, site conditions, etc. The management of fertilizer and water should be strengthened to increase the disease resistance of bagged fruits. In drought years, attention should be paid to postponing bagging time and avoiding high temperatures in early summer. Water should be poured before and after bagging. Leaking fruit gardens should be poured every 1 to 7 days to reduce ground temperature and improve fruit supply. Spray cooling was performed at ~14 o'clock. Fruits with large exposed surfaces on the upper part of the crown and on the back of the branches were not bagged. At the same time, avoid the use of inferior bags and plastic bags.
5. Conradus Membranaceus: 1 winter and spring scrape bark, concentrated burning, or in the late autumn before the female adults lay eggs combined prevention and control of other insects lurking in the branches of the winter, carry out the sedation of Sokcho and other objects, the spring before hatching grass The bundles were removed and burned. 2 Spray light diesel emulsion in the early spring, or 3~5 Baume degree of stone slushing agent. In each generation of nymph larvae, especially during bagging period, spraying 50% of quercus nut oil 800 to 1000 times has good effect. 3 There are many types of natural enemies in the whitefly, such as grasshoppers and many kinds of ladybugs. These natural enemies have the effect of inhibiting the harm caused by the whitefly. Therefore, we should consider using less or not broad-spectrum insecticides for prevention and control. It may be possible to use selective agents that have a smaller effect on natural enemies.
6. Maize elephants: apply soil pressure to the tree orchard orchard orchard, sprinkle a small amount of chemical fertilizer on the wheatgrass when watering or raining, in order to facilitate the decay of the grass and reduce the source of insects; observe the pests before they climb into the paper bag. , to strengthen the prevention and control of pesticides, and sprayed 48% of Lethburn 1000 to 1500 times liquid and other insecticides to kill adults.

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