According to the period of recovery
In the germination and emergence stage, corn suffers from locust plague, which may easily lead to soil compaction, lower ground temperature, poor ventilation, affecting seed germination and emergence, and timely loosening of soil after disaster to facilitate warming and ventilation. When the seedlings are severely affected and there are many shortages of seedlings, they must be replanted in time to ensure planting density.
Before the jointing of corn to tasselling, especially before the big bell-mouth stage, the male and female ear and part of the leaves suffered locust plague when the leaves were not extracted. As long as the unextracted leaves were not damaged and the roots remained, as long as timely cultivating and fertilizing, the field management was strengthened. In general, better harvests are still available.
After the corn has suffered head plague after heading, the plant's ability to restore growth has deteriorated, which has a great impact on the yield. According to the survey, any corn that has been cut off by hail will not be able to resume growth. If the ear section is intact, timely management will promote the recovery of the plant and reduce yield loss. More than 40% of the fields affected by the disaster were re-cast according to specific conditions and economic accounting.
Remedy in case of disaster
In the corn field where there are not many broken stems and most of the leaves are not destroyed, the photosynthesis can be carried out despite the leaves being torn. As long as the management is strengthened, a certain harvest can be obtained and should be preserved. Can pay close attention to topdressing urea, cultivating farmland, promote recovery, minimize losses.
If the stalk is severely damaged or if most of the leaves are destroyed by hail, the corn stalks shall be immediately cut off from the livestock or deep-rooted, greened, ploughed, and planted with green grass, green manure or autumn vegetables such as radish, cabbage, and cabbage. Increase income to make up for losses.
The complete disaster seedlings of the heart and leaves need to be artificially assisted by seedlings, and the seedlings should be top-dressed in combination with cultivator soils, combined with the on-site climate to strengthen fertilizer and water management.
The severely damaged plots should be replanted in a timely manner. It is better to transplant greenhouses and transplant them in the greenhouse and cover them with plastic mulching in order to promote premature birth.
Field remedies
Damaged wounds of corn plants (especially damaged parts of stems) are susceptible to pathogens such as bacteria or fungi and cause other diseases. In order to prevent necrosis of damaged parts of stems, 72% of agricultural streptomycin should be applied in a timely manner. Liquid or 5% bacteriostatic water agent 500 times the whole plant spray, plant wound disinfection to reduce the infection.
The application of nitrogen fertilizer to each acre as appropriate to promote the subsequent development of the leaf can form a larger leaf area, to ensure that the plant can produce more organic nutrient supply during the grain filling ear and grain development.
In the cornfields with flat topography, excessive precipitation often causes long-term accumulation of water in the fields, excessive soil moisture, plant growth is seriously affected, roots suffocate due to lack of oxygen and necrosis, life function decline, and has a great impact on yield. In particular, low-lying land and corn in paddy fields are prone to locust plague because of poor drainage. Therefore, it is more important to clear Sangou. If there is too much water, the land that cannot be drained in time can be transplanted with soil and transplanted to other plots.
After the corn has suffered hail disaster, it is imperative to strengthen field management and restore growth as soon as possible. It is necessary to cultivate the soil in time, cultivating the soil, remove the compaction, improve soil permeability, and restore the plant root system to normal physiological activities as soon as possible.
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