Citrus winter management points

After the citrus fruit was harvested, the tree body consumed a lot of nutrients and needed nutrients to restore the tree vigor. At the same time, winter was also a critical period for the differentiation of citrus flower buds and wintering of diseases and insects. Therefore, strengthening winter management is the basis for high yields and reduction of pests and diseases in the coming year. First, early application of base fertilizer in order to facilitate citrus flower bud differentiation, improve flower bud quality, increase tree nutrients, improve antifreeze ability, you must apply early basal fertilizer, the results of the tree can be fertilized after a week of fruit harvesting, young trees must be applied in November . Fertilizer applied early and the temperature is high, which is conducive to the decomposition of fertilizers and tree absorption, and the effect of fertilizer application is good. This fertilization is mainly based on organic fertilizers. In combination with fruit tree-specific fertilizers, it can be fertilized with ring grooves and strips. Second, trenching and drainage, to prevent wet damage due to continuous rain this fall, the humidity in the field, and citrus bogey dip, if the soil moisture, the soil roots susceptible to mildew, resulting in leaves yellow, fallen leaves, causing severe tree death. Therefore, in conjunction with fertilization in time to open the ditch moisture, the entire tree belt, easy to manage in the future. Thirdly, the pathogenic source and insect source of the hazard-free citrus fruit in the timely clearing garden are wintering in litter, weeds, and fruit droppings. Therefore, at the beginning of the winter (mid-November), the diseased branches, dried branches, fallen leaves, fallen fruit, and weeds were completely cleared out of the orchard in a timely manner, and were burned in a deep-buried manner. At the same time, all the late autumn shoots sent after September 20 should be cut off to prevent the late autumn shoots from extending and reducing the cold resistance of the tree. Fourth, pest control after the clear park, starting from late November, with 45% per month. Lithosulfur mixture 180-300 times foliar spray, spray once a month for 3-4 times, can effectively prevent overwintering anthrax, acarids, scale insects and other pests and diseases to reduce the number of pests, reduce the number of medications in the coming year, improve production benefit. 5. The prevention of freezing and freezing injury has a great impact on the citrus tree and its output in the coming year. It can be prevented by whitening the tree trunks and coating on the tree (tree belts) or (straw). The trunk can be whitened to prevent freezing and can be controlled. Main pests and diseases, with 72% of water, 22% quicklime, 3% lime sulfur and 3% salt mixed uniformly coated white, not to flow down after coating, without sticking into a group is appropriate, quicklime must be dissolved , otherwise it will absorb water and heat to burn the trunk. Antifreeze must be completed in early December to enhance the antifreeze effect.

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