Maize bacterial stalk rot is the biggest obstacle to the high yield of sweet corn planting. It mainly occurs in the small trumpet stage of corn, the big bell stage, and 1 to 2 weeks after the end of pollination. Symptoms shown are the wilting of the middle and upper leaves. Then, pus appeared in the middle of the plant stems, and odor odor was emitted. Finally, the whole plant died. If the prevention and treatment were not properly performed, the rate of dead plants in the field could reach 80%, which seriously affected the yield. The following describes the prevention and treatment of bacterial stalk rot in maize as follows:
1. Seed disinfection. Before sowing, soaking seeds with 600 times strong liquid chlorine for 15 minutes, or soaking for 20 minutes with 1 million units of agricultural streptomycin 500 times, to prevent seed sickness.
2. Soil disinfection. Prior to planting, 100 kg of lime was sprayed per acre for field disinfection to reduce soil pathogenic bacteria.
3. Reasonable fertilization. It has been proved that bacterial stalk rot caused by over-application of nitrogen fertilizer is very prone to bacterial stalk rot. Therefore, the prevention and treatment of bacterial stalk rot should start with the fertilization method. Appropriate application of organic fertilizer, phosphorus, and potassium fertilizer should be applied during fertilization. Especially in the late growth period of maize, reducing the application amount of nitrogen fertilizer is the most effective way to increase plant resistance and reduce stem rot. At the same time, 0.2% potassium dihydrogen phosphate solution can be applied outside the roots to increase the disease resistance and reduce the incidence of stalk rot.
4. Liquid control. The site of bacterial stalk rot disease in the stem, after the onset of the use of pesticide treatment, the liquid is difficult to enter the site of the disease, the treatment effect is poor, so the prevention must be prevention-based, after the onset of the principle of both the principle and treatment.
1 Agricultural control. After the onset of corn, the diseased plants should be uprooted and taken away from the field to prevent the spread of germs in the field.
2 liquid prevention. According to the onset of bacterial stalk rot in maize, it can be used in 3 to 10% of the 30% bactericidal special 400-times solution, 3 to 8 days after 8 to 10 days after corn planting, 5 days before the big bell-mouth period, and 1 week after the end of pollination. 800 times, 23% of rice harvest 600 times or 60% chlorothalonil 500 times and other fields spray, to prevent the occurrence of the disease.
3 liquid treatment. Spray: In the early stage of disease, use 53% ronacole 800 times, 25% urinary copper 500 times, 77% can kill 600 times, 30% bactericidal 400 times, 72% agricultural streptomycin 4,000 times Liquid or 1% neomycin-containing 3000 times solution, etc., for spraying; Irrigation: In the early stage of disease, use 600 times strong chlorine extract, 53% Longke, 800 times, and 72% agricultural streptomycin 4,000 times. Liquid and other pesticides were used for irrigation and control; stalk smear liquid: At the center of the disease, apply 1% lime milk to the stems of healthy plants to prevent pathogens from invading the plant stems.
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