Some plants in the recent cotton fields have a tendency to premature aging and measures must be taken early to ensure the high yield of cotton.
The main performance of the cotton plant stems to the top, the stem is hard, lack of flexibility; the main stem growth point is prominent, it is difficult to stretch new fruit branches, fruit segments; leaf color fade, new leaves are small; cotton plants in the middle and lower leaves appear red-brown spots, base Leaves withered; leaf margin scorch, severe premature shedding.
Causes of premature aging (1) Bad weather. This year's cotton suffered a severe drought in the early stage of its growth, and was affected by waterlogging in the middle period. The roots of the cotton plants were poorly growing and had poor ability to absorb fertilizer and water. (2) Improper fertilization. Partial application of nitrogen fertilizer in the early stage, excessive nutrient growth, and control is not timely, resulting in excessive consumption of nutrients. In addition, insufficient input of potash fertilizer can also cause red stem blight and induce premature aging. (3) pests and diseases. This year, Fusarium wilt showed symptoms for a long time. The serious diseased leaves had more leaves and the plant growth was weak. Affected by the drought, the early part of the spider mite was heavy and the growth of cotton plants was inhibited.
Prevention and countermeasures to improve the cotton field ditch, so that energy irrigation can ensure that the cotton root growth is normal. Scientific fertilization, especially the application of organic fertilizer, potassium fertilizer. In order to reduce the consumption of nutrients, it is necessary to promptly spray methothenate or boost muscle to control the prosperous growth of cotton fields. Timely control of tobacco and whitefly and other pests and diseases. A mixture of potassium dihydrogen phosphate and urea can also be sprayed.
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