The tip of the garlic-affected plant turns purple-red, and gradually develops along the leaf vein to the leaf sheath, chlorosis and yellowing. In severe cases, the whole leaf is dry and dead. Root dysplasia is prone to death. The plants are obviously dwarfed and the garlic is short. The heavy ones cannot be convulsions. The diameter of the garlic is about 5 cm. Generally, it is manifested at the end of February to the beginning of March. The initial yellow leaf spots occur, and yellow leaves occur in the whole field after 2 to 3 years. cause Partial application of chemical fertilizers, neglecting the application of organic fertilizers and micro-fertilizers, the concentration of aqueous solution is too large, causing absorption of roots; the tillage layer is too shallow, the depth of the soil is less than 10 cm with the tractor rotary tiller, the soil is underlying, raining or pouring After the water, the water does not seep and accumulate on the surface, so that the chemical fertilizer in the clay cannot penetrate into the underground layer in time. The concentration of the solution in the vicinity of the garlic root system is too high to cause burning. Because of the good permeability, a large amount of chemical fertilizer infiltrates into the lower layer of the soil, which reduces the concentration of soil solution and rarely burns roots. Continuous crop plots, not only the soil solution concentration is too high, but also root rot, blight and other disease hazards, resulting in yellowing of the leaves. Winter temperatures are high, precipitation is low, soil moisture is poor, or soil moisture is high; multiple cold currents cool down, causing plants to be frozen; pests and diseases; plants are deficient in calcium, magnesium and other elements; herbicides are used before emergence after garlic sowing Excess (such as acetochlor). All of the above are likely to cause yellow leaves and dryness. Expected measure Choose a white garlic clove that is harmless, disease-free, and has a single grain weight of 5 grams or more. It is best to carry out three-year rotations with crops such as wheat, corn, melons, beans, solanes, and potatoes. Rational application of base fertilizer. Deeply cultivated land 25 to 30 cm. If you use a rotary tiller to plow, you can use 100 grams of soil conditioner without deep cultivation before planting, add 100 kilograms of water, spray 1 mu of ground with a sprayer, and within 20 days after spraying, the soil can be loose and transparent at 50 cm depth, greatly improving Water seepage and water holding capacity to prevent stagnant water. The application of chemical fertilizers should be carried out in a small number of times. After the spring is returned to the spring, in the formation period of garlic and garlic, watering and topdressing should be combined in time. When the average daily temperature is 20~22°C, the sowing time of the covered mulch garlic is delayed by 7-10 days compared with the open sowing date. Before wintering, the seedlings should reach the strong seedling standard. When the soil moisture is high, the ploughing is sloping. After the yellowing of the leaves occurs, the cold groundwater should be poured immediately. On the one hand, the ground temperature is lowered to prevent the high temperature from damaging the root system. On the one hand, the cold groundwater contains high oxygen content, which can reduce the damage of root suffocation and at the same time reduce the soil solution. concentration. Before the planting is repeated, 5 to 6 kg of carbendazim or thiophanate-methyl per acre is sterilized. Spraying natural alfalfa in the early spring when it is green, enhance the photosynthesis of chlorophyll and promote the production of plant nutrients. This article URL: How does the garlic leaves turn yellow and dry? How can excessive fertilization cause garlic fertilizer? Intermediate for Cas 877399-52-5 Crizotinib Intermediate,Crizotinib Api,Crizotinib Cas 877397-65-4,Crizotinib Intermediates Shandong Bolode Bio-technology Co., Ltd. , https://www.bldpharma.com