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Control methods:
The physiological red tail of horseshoe is mainly used for prevention in the early stage. For the current severe disease field, 2-3 kilograms of ten-element boron fertilizer or 2-3 kilograms of boron-zinc-iron-magnesium fertilizer is applied per acre, and spraying can also be performed per acre of foliar. Elemental boron fertilizer 100 grams + potassium dihydrogen phosphate 150 grams of water spray 50-60 kg of stems and leaves, sprayed once every 5-7 days, and even spray 2-3 times.
Horseshoe stem blight: 1, to use disease-free species, before planting seedlings and seedlings to be treated with chemicals, available 25% to make 100 grams of EC + 50% carbendazim or 70% thiophanate powder 1500 times medicine Liquid, soak the bulbs for 12-24 hours before the seedlings, remove and dry after sowing, and then spray once before transplanting. Before the colonization, soak the seedlings with the above liquid for more than 6 hours, and remove the diseased seedlings and weak seedlings.
2. Intensify cultivation management. In addition to paying attention to normal and reasonable close planting and different stages of water and fertilizer management, special attention should be paid to the ratio of nitrogen, phosphorus and potash fertilizers. In particular, phosphorus and potash fertilizers should be added. Do not apply nitrogenous fertilizer to partial fertilizers and spray phosphoric acid properly. Dihydrogen potassium, field strains should be pulled out in time, diseased leaves, diseased plants, and diseased rods must be burned in a concentrated manner; implementation of crop rotation, especially in old wards, should be carried out for more than three years to ensure economic and effective measures against this disease.
3, chemical control, no incidence of field crop spraying protection, the early onset of the following agents can be used: good to think, love Miao, R & F library, the enemy off, Shi Bao Gong, Wei Wei, off enemy forces, etc., the above drugs to be replaced Use, depending on the condition, spray once every 7-10 days, 2-3 times in a row. A small amount of neutral detergent powder or other spreading agent may be properly added during the use of the drug to enhance the adhesiveness of the liquid and improve the efficacy.
Horseshoe cultivation skills
Horseshoe physiological red tail is a physiological disease caused by the lack of boron, zinc, iron, manganese and other trace elements in the soil where horseshoe is planted for many years. The site of the disease is mainly in the tail of horseshoe stalk, evenly yellowed and without spots; and the horseshoe pole Blight is mainly from September to October in the late stage of growth. Horseshoe seals are extremely easy to occur under conditions of high temperature and high humidity. The main damage is leaf sheath, stem, flower and other parts. The initial stage is water-stained, followed by dark green lesions, and then the entire leaf is dry. The whole plant withered after the onset of disease. It often forms the center of disease and spreads from the center to the surrounding area. Usually there are black spots on the diseased leaves, and there is a mild gray mold layer on the surface of the diseased leaves under high humidity conditions. Rely on wind, water and soil.