Rice blight is a physiological disease commonly known as "red seedlings" and "rust disease." In recent years, the disease has been aggravated in various parts of the country, and the average field has been reduced by 1-2%. The disease generally begins 10-15 days after the transplanting of the seedlings. The disease duration is about 1 month and the length is up to two months. Symptoms are that young seedlings do not return to green, or grow poorly after returning green, and they do not even produce fresh seedlings, even dead seedlings. The above-ground part of the diseased plant is short and has little or no parturition. At the beginning, the leaves were dark green, and afterwards, the lower leaves appeared auburn spots along the midrib and gradually expanded, causing the entire leaves to dry and zoom, which looked like a “fired fieldâ€. The rice roots started to be dark brown, blackened and rancid afterwards. The causes of the rapae blight were: excessive application of raw fertilizer, poisoning of the roots of rice seedlings; second, the lack of phosphorus, potassium, and zinc in the soil, and malnutrition of rice strains; and third, long-term deep-water irrigation, ploughing and plowing, and the roots were not tied down. , Soil oxygen deficiency; Fourth, soil is thin, cold, plate, thin, resulting in poor rice root development. Prevention measures: 1 See Huimanfeng immediately after the disease, 100-125 ml per mu, 500 times the water, while applying 1 kg of zinc sulfate per mu, degradation of toxic substances, enhance root activity, and promote seedling transformation. 2 Increase the application of phosphorus, potassium and zinc fertilizers. Phosphorus deficiency applies 25 kg of calcium phosphate per mu, potassium deficiency applies 10 kg of potassium chloride or potassium sulfate per mu, and zinc deficiency applies 1 kg of zinc sulfate per mu. The use of base-based phosphorus, potassium, and zinc fertilizers is recommended because most of the disease occurs in the seedling stage and the base application works well. You can also apply after the disease. 3 drainage dew, breathe oxygen. If the paddy field has deep mud, bubbles and smell, it should be drained and softened in time to improve the ventilation of the soil and promote the emergence of new roots. 4 The organic fertilizer is fully cooked before application. 5 Vigorously promote straw return.
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