Rice blight, also known as rust, is a physiological disease that is generally caused by potassium deficiency in the Meihekou region. This disease usually begins at the early stage of rice tillering, and reaches the peak at the peak of the tillering period. The affected plants become stiff and have fewer tillers. The small, old leaves sag, but the heart is narrow, stems are weak, erythematous small spots appear near the tip or veins. The main causes of the disease are soil zinc deficiency, potassium deficiency, long-term deep irrigation or wet and cold fields in the mountains, low soil temperature and poor root development. The main prevention measures include improving the soil structure, such as deep plowing and sand mixing. 2 Potassium fertilizer and zinc fertilizer are added, and potassium fertilizer is applied as early as possible. 3 strengthen field management, shallow water ground irrigation.
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