Apple Management in March Grabs Four Points Chief Reporter Zhao Yun What should I pay attention to in the apple orchard management in March? Professor Ma Zhifeng of the Yangling Vocational and Technical College reminded the majority of farmers to do the following four things: In the middle and early March of March, before the first peak of the growth of the apple tree roots, the fruit growers must pay attention to top-dressing and irrigation. During this period, top dressing should be dominated by nitrogen fertilizer, supplemented by phosphorus and potassium fertilizers, and in combination with application of some trace fertilizers. According to research, for every 100 kilograms of fruit produced, 1.6 kg of pure nitrogen, 1.12 kg of pure phosphorus, and 1.28 kg of pure potassium should be applied throughout the year. Generally, trees that grow weakly should increase the amount of fertilization. Trees that grow strongly have the appropriate amount to reduce the amount of fertilizer. Large-year trees can increase the amount of fertilizers appropriately, while young trees can properly reduce the amount of fertilizers. Orchards that are underutilized or do not use base fertilizers should increase fertilization. Volume; The fruit trees with dark green leaves and late fallen leaves in autumn last year can also be applied less or not. Irrigation should be performed after fertilizing apple orchards. Irrigation requires infiltration of 60-80 cm of soil. Irrigation method is mainly based on furrow irrigation, and water shortage areas can use hole irrigation. After the top-dressing irrigation, a whole park cultivator shall be conducted in time. In the middle and early March of the Qingyuan Garden, the orchards must be completely cleaned up before fertilization to remove fallen leaves, scrape rough old diseased skin, rot rot, remove branches of dry rot, and bring all the diseased bodies out of the orchard to be burned or buried. After the clear garden, the whole tree was sprayed with a 3 to 5 degree lime sulfur agent to eliminate various overwintering germs. In a serious orchard of scale insects, a single 4 to 5 degree diesel emulsion is sprayed before sprouting (dilute the stock solution 10 times.) The first peak of rot disease occurs from early March to late April.ç–¤ Immediately scrape off, and then apply it with agricultural anti-120, thiophanate-methyl and other drugs. The large hacksaw is also smeared with medicine mud. In addition to the three tasks of top-dressing, carving, irrigation, and clearing gardens, Professor Ma Zhifeng also reminded the farmers that this month, they also need to adjust the angle, orientation and adjustment of the fruit trees before the apple tree sprouts. The germination number of buds. How Apple Trees Prevent and Control Pests and Diseases in March In March, the apple plant diseases and insect pests were relatively weak or had not started activities. This is the most favorable opportunity for apple pest control. It can greatly reduce the base number of pests and diseases, reduce the pressure of prevention and treatment throughout the year, reduce the number of later spraying, and improve the control effect. Scrape the bark to scrape bark spots, rot spots and old cracks, clear the orchard, and then apply a wound protection agent. Rot Disease: It is the best time to prevent rot disease from late March to the flowering period. At this time, the rot disease spots begin to appear as water stains and are easy to identify. The entire park should be carefully examined for early detection and early cure. When scratching a lesion, it is necessary to scrape off a good tissue of 1 cm to make the wound into a new one so that the wound can be healed. Immediately after the scraping, the lime sulfur mixture stock solution, bacteriocin, or more than 20% concentrated salt water should be applied. At the same time, the scraped tissue must be collected and burned or buried deeply. If it is not cleansed, it can be thrown on the ground or piled around the orchard. In case of wind and rain, these diseased tissues can be used as a source of infection for new infections. For trees with large lesions, which have affected the transduction of tissue, bridging techniques should be used to remedy the bridge during the flowering period. Ringworm disease: For the ring vein disease that occurs on the branches, the best method of prevention and cure in the early spring is to cure the disease. At this time, the tumor of the trunk is clearly visible, which is conducive to the curettage and the applicator. It should be noted that the curettage method is very different from the rot disease. The rot disease is caused by most of the lumps, so it is necessary to completely scrape the diseased tissue. The tumor of the ringworm disease is often found throughout the entire trunk or the main branch. The curettage must be light, that is, with a spatula to gently scrape off the uplifted, neoplastic lesions, and when it is scraped near the bark, it does not stop scraping. After the scraping, it is also necessary to apply an agent. The application of the drug can refer to the type of rot disease. And to collect scraped skin tissue. Spray lime sulfur mixture is a kind of inorganic sulfur that can kill bacteria and kill insects. It can control powdery mildew, rust, brown spot, red spider, scale insects and other pests. The best time to use lime sulfur is in the orchard before the tree sleeps and before the early spring sprouts. Lime-sulfur mixture is made of quick lime and sulphur, and the best proportion of the three is 1:2:10. When cooking, pots or pigs must be used. Using copper or aluminum pots will affect the efficacy. Usage: 1. Spraying method: Spraying method can be used to control spider mites, scale insects, rust, and powdery mildew in the orchard during dormancy or germination. 2. Wound treatment agent: Use lime sulfur coating to reduce the infection of harmful bacteria to prevent rot disease and ulcer disease. Seeding Machine,Seed Drill,Seed Planter,Drum Seeder Taizhou Yingtian Agricultural Machinery Manufacturing Co., Ltd. , https://www.sakuradaagc.com
In March, the apple roots began to grow and absorb nutrients. The sap flowed and the buds sprouted. The many fruit tree pests that lurk in the apple tree body, orchard weeds, deciduous tussocks, and soil gaps, etc., have also revived from hibernation and reached their peaks during the budding period. At this time, the ability of the apple tree to resist the invasion of bacteria is relatively weak, and the infection and damage of the apple tree rot enter the peak period. Therefore, the management of apple trees in March should be done with fertilizer and pest management.