Symptoms During the growth and development of the corn, it suddenly encountered heavy storms and it appeared lodging. There are three kinds of lodging: First, the characteristics of corn varieties, general plant height 30 to 40 cm before the normal growth, and then lodging, showing the habits of earthworm growth; second, after jointing lodging, but their ability to restore; third, lodging when heading Plants often squeeze each other and it is difficult to naturally restore upright conditions. In addition to hereditary factors, lodging causes more precipitation and softer roots. There are few stem lodgings and broken stems. After lodging, the new roots are still increasing and the roots are deeper and deeper. 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. Control methods 1. Use lodging-resistant corn varieties. 2. After the corn lodging, it is best to organize the labor force assault in 2 to 3 days. If the corn grows new roots, it will inevitably pull off the root system and disrupt the level of leaves that will be re-adjusted to increase photosynthesis. Photosynthesis and transmission of nutrients are normal. Therefore, it is necessary to seize the time and rush to help. Once it is delayed, there is no need to help. 3. While supporting the soil, topdressing quick-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. Two lines, 3 to 4 strains tied together. Farming is generally planted with high density, and 5 to 6 strains can be tied together. Do not pull the pressure on the plants below to prevent the stalks from breaking. After correcting the soil, the soil should be cultivated in time to protect the integrity of the leaves. Apply fertilizer on the basis of this to make the corn grow and develop into normal as soon as possible.
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