The locust plagues are the most disastrous weather in Hebei Province and have a great harm to cotton production. In particular, the cotton fields before and after the wheat harvest will undergo locust nuisances at different levels. They usually occur at the bud stage or early flowering stage. At this time, it is the cotton budding and budding stage. Great harm. After the cotton was hit, the branches of the light were broken, and the severe ones were severed. However, the regeneration ability of cotton is strong. Remedial measures are taken in time to strive for rapid recovery of cotton, reasonable pruning and remodelling of plant type, and still obtain a good harvest. The main measures are:
1, timely drainage and prevent flood damage. In the event of hailstorm, if water is accumulated in the fields due to rainfall, the soil moisture is too high and the rot-root phenomenon easily occurs, which affects the normal growth of cotton plants. After the disaster, flood drainage and dehumidification should be promptly conducted to improve the soil environment.
2, timely cultivator loose soil temperature. After the disaster, the ground temperature dropped sharply. In addition, due to the excessive humidity in the soil, it often caused ground panel knots and was not conducive to the growth of cotton roots. Cultivate one or two times in time to increase soil temperature and reduce soil moisture. Ventilation is promoted to promote the growth of cotton roots and prevent the death of cotton seedlings caused by pan salt.
3, after the hail weather improved, wet time to grab a quick application of nitrogen and a small amount of potash fertilizer, as soon as possible to promote the normal growth of root growth, promote new hair. The dressing method is to grow fertilizer. The amount of topdressing fertilizer per acre is generally from 10 to 15 kg of urea and 5 to 10 kg of potassium sulfate. When top dressing, the fertilizer should leave the cotton plant 10 to 13 cm to prevent burning the roots.
4. In time pruning, after the recovery of the affected cotton plants, it is easy to form a long cotton, which is not conducive to the emergence of lace bells, pruning is not timely, will cause the cotton plant grows crazy, Yu cover, rotten bell and so on. Therefore, it is necessary to timely pruning, reshape the plant type, and create a good group structure.
5, chemical ripening, late in the affected cotton, mainly rely on autumn peaches to seize the output, often after a large proportion of frost. In early October, choose sunny morning, spray 40% of ethephon ripening, 100 to 150 grams per acre, watering 40 to 50 kg, prompting early mature cracking of cotton bolls, for more pre-frost flowers, increase production and increase efficiency .
1, timely drainage and prevent flood damage. In the event of hailstorm, if water is accumulated in the fields due to rainfall, the soil moisture is too high and the rot-root phenomenon easily occurs, which affects the normal growth of cotton plants. After the disaster, flood drainage and dehumidification should be promptly conducted to improve the soil environment.
2, timely cultivator loose soil temperature. After the disaster, the ground temperature dropped sharply. In addition, due to the excessive humidity in the soil, it often caused ground panel knots and was not conducive to the growth of cotton roots. Cultivate one or two times in time to increase soil temperature and reduce soil moisture. Ventilation is promoted to promote the growth of cotton roots and prevent the death of cotton seedlings caused by pan salt.
3, after the hail weather improved, wet time to grab a quick application of nitrogen and a small amount of potash fertilizer, as soon as possible to promote the normal growth of root growth, promote new hair. The dressing method is to grow fertilizer. The amount of topdressing fertilizer per acre is generally from 10 to 15 kg of urea and 5 to 10 kg of potassium sulfate. When top dressing, the fertilizer should leave the cotton plant 10 to 13 cm to prevent burning the roots.
4. In time pruning, after the recovery of the affected cotton plants, it is easy to form a long cotton, which is not conducive to the emergence of lace bells, pruning is not timely, will cause the cotton plant grows crazy, Yu cover, rotten bell and so on. Therefore, it is necessary to timely pruning, reshape the plant type, and create a good group structure.
5, chemical ripening, late in the affected cotton, mainly rely on autumn peaches to seize the output, often after a large proportion of frost. In early October, choose sunny morning, spray 40% of ethephon ripening, 100 to 150 grams per acre, watering 40 to 50 kg, prompting early mature cracking of cotton bolls, for more pre-frost flowers, increase production and increase efficiency .
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