1. Select resistant varieties. 2. Soil treatment: During the site preparation, the soil is exposed for 5 days to 7 days and the soil is fully weathered and whitened. Lime 50 kg -75 kg per acre, neutralize the acidity of the soil and inhibit the growth of germs. 3, Gaochun pit: high temperature and humidity are prone to blight, the use of sorghum deep pit planting method, reduce the groundwater level, prevent the accumulation of water after the rain, so that the surface soil ventilation, can reduce the disease. 4, cut sparse leaves: when the disease began to occur, sparsely cut the base of the leaves, so that the field plants, facial surface ventilation and humidity, can inhibit the growth and spread of bacteria, can reduce the incidence of disease.
When the disease begins to occur, the diseased plant is quickly removed and sprayed with 75% chlorothalonil 500-800 times, or 50% carbendazim 500-600 times, or 70% enemy powder 500 times. 800 times liquid, spray once every 7 days -10 days, 3 times - 4 times. Each time the liquid is sprayed on the stem of the lower part of the plant, spraying to the leaves to the degree of wet not dripping, can receive better results.
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