Causes of premature aging of cotton and its control measures

Premature aging refers to the best period of cotton bolling. Due to poor fertility, malnutrition, and disease damage, premature detachment of cotton leaves results in a phenomenon in which boll light, pod pods, and poor fiber maturation are significantly reduced.
First, premature causes
1. Root injury is prone to premature aging. Cotton seedlings have long waterlogging time, soil compaction, poor air permeability, poor root development, impeded growth and premature aging, excessive use of herbicides, injury to cotton roots, less cultivable soil in buds, undeveloped deep root systems, and soil conservation and drought resistance Poor premature aging.
2. Fertilizers lack premature aging. In the cotton field, organic fertilizer is not applied for a long time, and organic matter and trace elements in the soil are lacking; the amount of base fertilizer is insufficient, the application of flower and bell fertilizer is less, and the fertilizer quality is poor; the use of flower bell fertilizer is too late, the soil moisture is insufficient, the fertilizer effect cannot be brought into play, and the drought time is long. , lack of nutrition and premature aging.
3. Sudden disease and insects are prone to premature aging. For example, T. moth, Aphis gossypii, and red spider are seriously endangered. The cotton leaves are eroded or shed. Yellow wilt disease at the seedling stage has not been cured. When the temperature and humidity are appropriate in the autumn, red leaf stem blight occurs easily; , artificially immersed in water, cotton due to "water intoxication" leaves a large number of shedding and premature aging.
Third, prevention and control measures
1. Timely cultivating and promoting root development. The premature failure of cotton plants is caused by the underdevelopment of roots. It is necessary to start intensive cultivation of cotton fields from the seedling stage, promote root barrow, and achieve deep root strong seedlings without premature aging. Cotton budding season, more rain, should do a good job in trenching and stain prevention work, especially at this time the application of herbicides, we must be careful to prevent excessive damage to cotton roots. When cotton is bolled, it should be properly cultivated, and the depth of cultivator should be gradually increased to stimulate the root system to expand rapidly into the depth range, expand the absorption range of the root system, and enhance the root absorption capacity. Through cultivating, it can regulate the moisture and temperature of the soil surface, improve the aeration of the soil and improve the ability of soil conservation and drought resistance, which is conducive to the premature growth of cotton.
2. Formula fertilization, enhance fertilizer and water nutrition. Appropriate organic base fertilizer, light application of bud fertilizer, re-apply ringbell formula fertilizer, and apply top-coating and nourishing fertilizer as appropriate, so as to provide enough nutrients for cotton growth to prevent premature decline. In particular, the application of the “four-in-one” formulation balanced fertilization technology for cotton can provide comprehensive nutrition for cotton growth, increase production, and can effectively reduce pests and diseases caused by cotton. Water is the source of life. When it encounters drought and water, it meets the waterlogging and creates a good soil moisture environment for cotton roots. It not only satisfies cotton fertilizer and water requirements, but also plays a role in regulating fertilizers by water, which is the key to preventing premature aging of cotton.
3. Timely topping, timely pest control feeding. Timely topping, pest control, and top-dressing nutrient fertilizers, so that more nutrients turn to the cotton autumn bell, if the topping is too late, excessive consumption of nutrients, the upper buds, young bells can not be effectively mature. Strictly prevent cotton bollworm, aphids, telophytes, spider mites, etc., from damaging cotton leaves and premature aging. The best time for prevention and treatment is 5-7 pm, with the addition of “Zhixiaowang” nutrient liquid fertilizer (40g/barrel) in the liquid, which can enhance the efficacy of insecticide treatment and supplement nutrient of nitrogen, phosphorus and potassium fertilizers. Clearly promotes the maturation of autumn bells, and has significant growth potential and anti-premature function.

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