Symptoms During the growth and development of the corn, it suddenly encountered heavy storms or typhoons that caused lodging. There are three kinds of lodging: First, the characteristics of corn varieties, normal plant height 30-40cm before growth, and then lodging, showing the habit of earthworm growth; second, after jointing lodging, but their own ability to recover; third is lodging when heading Plants often squeeze each other and it is difficult to naturally restore upright conditions. In addition to hereditary factors, the cause of corn lodging was rooted in the production of precipitation and soft ground. There are not many cases of stem lodging and broken stems. After the lodging, the new roots are still increasing and the roots are deepening again. In addition, if the density is too high or if excessive nitrogen fertilizers are applied, external forces such as storms can also cause the corn to be scraped.
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Prevention methods (1) Build windbreaks. (2) Selection of lodging resistant corn varieties. Such as: Dandan 13, Dandan 2, Danyu 13, Zhongdan 2, Jingzao 10, Peking University 1236, Nongda 3315, Lu Xia 7, Dandan 3l, Changza 7 and Xidan 2, Benyu No.12, Luyu No.16, Yuyu No.14, Yuyu No.15, Yuyu No.16, E Yusun No.1, Zhangdan 251 and so on. (3) After the corn lodging, it is best to organize a labor force assault in 2-3 days. If the corn grows new roots, it will inevitably pull off the root system and disrupt the level of the blade that was re-adjusted to increase photosynthesis. Affects the normal progress of photosynthesis and transmission of nutrients. Therefore, it is necessary to seize the time and rush to help. Once it is delayed, there is no need to help. (4) While supporting the soil, chase fast-acting fertilizer. It is best for the two groups to start from the opposite direction of lodging, and grab the upper part of the corn plant to gently pull up. In two lines, 3-4 strains were tied together. Farming generally has a high planting density and can bind 5-6 strains together. Do not pull the plant under pressure first to prevent the stem from breaking. After correcting the soil in time, try to protect the integrity of the leaves. On this basis, topdressing, corn growth and development as soon as possible into normal. (5) Advocate the use of Huimanfeng (Gaomeishi), 100m1 per 657m2, 150-200 times dilution of water, 1-2 sprays, and 600-800 times of active liquid fertilizer or 100ml of vitality. The effect of increasing production is obvious. (6) Spray corn Zhuang Feng Ling. See corn stalks (7) for specific methods.