Core Tip: Before the apple falls to the bag, as the temperature rises, various pests and diseases have begun to occur or some pests and diseases will occur. Grasp the timing to prevent pests and diseases, and lower the base of pests and diseases. The high yield and quality, as well as the improvement of the intrinsic quality of apples, play an extremely important role. Three key medications The first medication, optional medicinal agent: 12000 times of fruit radish or 10,000 times of 10,000 times plus 8000 times of worm clearing plus 3,000 times of Jian Litong or 1000 to 1200 times of galvanized 600 times of galicus or 2000~2500 times of heavy calcium Water is 4000 times. Second medication: This medication is a key period for the prevention and treatment of cotton, and the preferred insecticide is An Minle. Optional pharmacy: An Min Le 1000 times plus worm clear four 8000 times plus Jian Li Tong 3000 times or Li Zhi 1000 ~ 1200 times plus Gays 600 times or heavy calcium 2000 ~ 2500 times plus soft water through 4000 times. The third medication: the last medication before bagging, is the key to preventing all kinds of fruit problems in bagging apples. Generally, two kinds of fungicides are used, and the protective agent and the therapeutic agent are used. Within three days after the administration, a good quality fruit bag is selected for bagging. Optional pharmacy: 10,000 times plus worm worms 8000 times plus Jian Li Tong 3000 times or Li Zhi 1000 ~ 1200 times plus high 600 times plus Gayles 600 times or heavy calcium 2000 ~ 2500 times plus soft water through 4000 times. Pay attention to nutritional supplements Calcium can not only enhance the ability of fruit trees to renew new roots, improve tree potential, but also promote the thickening of apple cell wall, avoid apple cracking, and enhance the resistance of fruit trees to the external environment and prevent defects such as blight and acne. Calcium physiological diseases occur. There are two key periods for the absorption of calcium by apple trees. One is the young fruit period after the flower is dropped to the bag before the bagging. The second is the bag utilization of the apples after the bag is removed, and the utilization rate is highest after the flower is dropped to the bag. Therefore, we must pay attention to calcium supplementation after the flower is dropped to the bag. Calcium should be added every time you spray, and calcium should be supplemented at least 3 times a year. Calcium supplements are preferred for organic calcium and chelated calcium. After the apple is flowered, it needs to be supplemented in time before bagging. Generally, it is carried out in early June. Nitrogen and potassium fertilizers are the main factors. Nitrogen fertilizer can promote fruit expansion. Potassium fertilizer can promote the conversion of mixed buds to flower buds. According to the situation of fertilization for many years, the high-nitrogen, high-potassium and low-phosphorus compound fertilizers have a good effect during this period. At the same time, it is also necessary to carry out topdressing on the ground. It can be dried, sprayed, and sprayed with amino acids. It can quickly replenish organic nutrition and strengthen the tree without taking the risk. Prevention and treatment of cotton and mildew Once the apples are not paying attention to prevention and control, they will cause serious damage to fruits, leaves, branches and roots, resulting in a decline in yield and quality, which will affect the life span of apple trees. Under normal circumstances, the most favorable time is in the middle of May each year, that is, after the apple falls and the second time before the bag is applied. If the apples of the garden are more harmful, the second pesticides before the flowering to the bagging are preferred to the osmotic agents such as An Minle and Lesben, and also have good control for the control of leaf curlers and scales. effect. Usually, in the prevention and control of mold heart disease, fruit growers will choose a better quality fungicide to spray once in the red, early flower, full flower, and flowering periods. However, the cost is too high, and the flowering period is prone to phytotoxicity, and the amount of pesticide residues in the fruit is large due to the excessive number of times of administration. The feasible prevention and treatment methods are as follows: First, attach importance to the clearing garden, select a good quality fungicide, spray the fruit trees evenly and carefully, and reduce the base of the pathogenic bacteria. Second, when 80% of the flowers are dropped, the fungicide is used alone according to the weather conditions. If the temperature is stable, use a protective fungicide; if the temperature is unstable, choose a therapeutic fungicide. Third, pay attention to the use of two kinds of eradication fungicides before bagging, such as multi-antibiotics plus Lizhi, or agricultural anti-120 plus Lizhi. Disclaimer: Some articles on this website are transferred from the Internet. 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