At present, cotton is about to enter the bubbling period. The management of cotton is very important. If there is no management, it will reduce income. It should be scientifically managed according to the growth of cotton. China Pesticide Network Xiaobian gives you the trick:
First, the smog prevention of rotten continuous continuous rain and excessive soil moisture are likely to cause cotton rotten bells. As the saying goes, "Autumn cut through a layer of skin, can plow a plough in the spring." Therefore, in view of the fact that there were more rainfalls in the previous stage, and some cotton fields were over-growth and heavy-dull, the management could adopt the push-plant and ridge and shallow-cultivation to achieve soil erosion and soil moisture reduction, and inhibit the growth of the soil. To enhance the ventilation and transparency of cotton fields, thereby reducing the occurrence of rotten bells. The rotten bells that have appeared in the field should be taken off and taken out of the field in time to concentrate on drying, which can not only obtain a certain yield, but also reduce the amount of bacteria in the field. In addition, after the cotton is pushed and ridged, spraying 50% carbendazim WP can effectively prevent the occurrence of cotton rotten bells.
Second, spray fertilizer to prevent premature aging Cotton premature aging is generally caused by cotton stem blight, mainly due to physiological disorders caused by potassium deficiency. Taking into account the previous period of rainy days, large rainfall, high soil water content, root hypoxia, etc., the ability of roots to absorb medium and trace elements is reduced, which may aggravate the occurrence of the disease. Therefore, in management, the nutrients required for cotton plants can be supplemented by foliar spray fertilizer to inhibit the development of the disease and slow down the premature aging of cotton. Pesticide manufacturers remind everyone to spray 1% to 2% urea water and 1% to 2% potassium sulfate or potassium chloride aqueous solution or 0.2% potassium dihydrogen phosphate aqueous solution, spray 2 to 3 times, between two times It should be 5 to 7 days apart. After the rain, the field water is removed in time, and the shallow cultivating can eliminate the cotton field knot, which can also reduce the occurrence of premature aging of cotton.
Third, the whole branch control Wangwang cotton in the late stage spraying the strong peach to eliminate the spirit, can reduce the bud bell off, and replace the artificial pruning cotton, to achieve "four door lock". The growth period is delayed and the previous period of rainfall is more, and some cotton fields have a tendency to grow. In order to reduce nutrient waste, the lower old leaves and yellow leaves should be removed in time, and the upper inactive flower buds should be removed (the buds that grow after August 10, September 5) Flowers after the day cannot form yield). For some cotton fields with severe canopy closure, you can take the cruel cotton repair, remove the upper large leaf open skylight, cut off the lower empty fruit branches, etc., to achieve ventilation and light transmission, reduce the bud bell.
4. The main pests in the late cotton field are cotton bollworms and blind mites. Drugs should be selected as soon as possible to prevent blindness, and if the harm of blind elephants is neglected, the limited autumn peaches cannot be preserved. The pesticide network recommends the use of pyrethroids in combination with phoxim or profenofos. It is also possible to directly use a compounding agent such as Cheng Rui and Xi Fenglie. The prevention time should be before 9:00 am and after 4 pm. When spraying, start from the four sides and proceed from the outside to the inside. If you can control the rule, it will be better.
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