Prevention of rotten bells is an important part of improving cotton quality and cotton yield. The rotten bell is the result of comprehensive effects of various factors such as cultivation and management, cotton breeding, climate, and pests and diseases. The unfavorable climatic conditions (such as continuous autumn rain) have a certain relation to the number of rotten bells, but the fundamental reason is also the cotton's own fertility status. In particular, the cotton plants are growing too vigorously, the leaves are hypertrophic, the concealment is serious, the lighting conditions are poor, the plants contain high nitrogen content, the tissues are loose, the shells are thick, the cracking is slow, and the resistance to pests and diseases is weak, often resulting in a lot of rotten bells. Therefore, the prevention and treatment of bad bell must be based on agricultural control, combined with chemical control, to promote early-onset, stable growth, not greediness, and improve the disease resistance of cotton.
First, master the fertilizer and water management during the flowering and bolling period to effectively see the sky, see the land, see the seedlings rationally reapplying the flower and bell fertilizer, make the top cover and cover the bell fertilizer, and promptly resist drought (especially strictly grasping the post-stage fertilizer and drought resistance), so that the fertilizer effect is The flowering and bolling period is fully utilized to ensure that the cotton will have early peaches, multiple peaches, and large peaches, and the cotton leaves will fade when it enters the initial flocculation stage, which is beneficial to early maturing, high quality, and high yield.
Second, do a good job of clearing the ditch and upright cotton plant work Qinggou and upright lodging cotton plant, ensure smooth drainage, reduce the humidity in the field, and strive to reduce the adverse effects of heavy rain and autumn rain, but also an important measure to reduce the rotten bell.
Third, timely pruning Improve lighting conditions Increase light intensity, promote early maturity. In particular, the overgrown field should be opened with a â€œskylightâ€ to ensure ventilation and light transmission.
Fourth, to strengthen the prevention and control of pests caused by pests and wounds, increase the chance of pathogen infection, it is necessary to strengthen the work of prevention and pest control, eliminate pests in cotton fields.
Fifth, pay attention to crop rotation to reduce the base number of pests and reduce the rotten bell.
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