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How to prevent the occurrence of dead seedlings in corn seedlings
After the emergence of corn, some plots often cause yellowing and dead seedlings of seedlings due to root rot. In the high soil moisture in the south, the tip of the seedlings turns yellow and brown first. After 2-3 days, the whole seedlings die, and the seedlings are pulled out. It can be seen that the roots have turned dark brown and rot. In the northern region, even if there is no water in the soil, the seedlings will start from the upper leaves, the leaves will slowly turn yellow and dry, and will expand downward along the leaf margin; the roots will be dry and have reddish-brown lesions, and the seedlings will die when severely affected. In addition, underground pests can also cause dead seedlings. Control methods: plant disease-resistant or disease-resistant varieties. The disease is reduced by seed coating. In the south, metalaxyl manganese-zinc fungicide should be added to the seed coating agent, and carbendazim and other fungicides should be added in the north. In the disease-prone area, the fungicide is directly used for seed dressing at 0.4% of the seed weight. The southern region should pay attention to the drainage in the field. Balanced fertilization, increase the application of phosphate fertilizer when planting, improve the disease resistance of seedlings.
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