How to control summer corn in disaster weather

Summer corn growth season is in the summer high temperature and rainy season. It is wind, flood, maggots and other meteorological disasters that occur frequently. Every year, corn of different areas and degrees is affected. How to deal with these meteorological disasters in the production of summer corn? Should be based on different disaster classification guidance, strengthen field management for prevention and control.

First, hail disasters Summer maize suffered locust damage at the germination and emergence stage, which could easily lead to soil compaction, lower ground temperature, poor ventilation, and affect seed germination and emergence. After the disaster, the soil should be loosened in time to facilitate warming and ventilation; before the jointing of corn to tasselling, In particular, before the big bell-mouth period, when the male and female ears and some leaves have not yet been extracted, they suffer from locust plague. As long as the unextracted leaves are not damaged and the root rot remains, cultivators and fertilization should be applied in time to strengthen field management. Generally, a good harvest can still be obtained. After the heading of corn, it suffered a locust plague, and the ability of the plants to recover grew worse, affecting the yield. According to investigations, any corn that has been cut off by hail will not be able to resume growth; if the section is intact, management should be strengthened in time to promote plant growth and reduce yield loss.

2. Severe wind disasters In July and August in summer, heavy storms often occur, causing corn lodging or stem folding. Maize lodging or stem-folding before the maturity of corn plants should be promptly raised to avoid pressure between plants and affect photosynthesis. For inverted corn, if it is only rooted, the fallen corn plants can be straightened in time. If it is a stem fold, the fallen corn should be bundled together to support the plants.

III. Flood disasters Maize is a crop that requires large amounts of water and is not tolerant to growth. When the soil moisture exceeds 80% of the field capacity, plant growth and development are affected, especially at the seedling stage. . In the middle and late stages of high temperature and rainy conditions, corn roots often suffocate due to lack of oxygen and cause necrosis, resulting in rapid decline of vitality, premature plant withered, and a great impact on corn yield. According to surveys, corn usually accumulates water for 1 to 2 days before and after tasseling, and the impact on yield is not obvious. However, water production is reduced by 20% after 3 days and water production is reduced by 40% in 5 days. For corn fields that have suffered locust plagues, water in the fields should be eliminated as soon as possible to reduce soil and air humidity, and to promote the recovery of corn plants. When water can be removed from the fields normally after excluding water, cultivators and soil should be promptly ploughed to remove compaction to prevent lodging. Improve soil permeability, restore plant roots to normal physiological activities as quickly as possible, supplement replenishment with available nitrogen fertilizer, and accelerate plant growth to reduce flood damage.

In addition, it should be noted that after hail and flood disasters occur in corn, the growth and development of corn plants will often be hindered, and the implementation of various management measures must be well integrated with the actual situation.

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