The fine management of cotton in the middle and late stages has an indispensable role in ensuring the top cover of the cotton autumn peach. The experience that has been summarized in recent years is shared with everyone. The first is to control cotton wilt and verticillium wilt. Prevention and control of these two diseases is the most important thing to do before the disease is not prevented, especially after the rain, can be used 72% of the streptomycin 3000 times or 50% of carbendazim 500 times, with potassium dihydrogen phosphate 300 times Liquid, foliar spray, 5 to 7 days 1, even spray 2 to 3 times. The second is spray fertilizer to prevent premature aging. Cotton grows vigorously in the middle period, excessive nutrient consumption, easily lead to premature decompensation of cotton in the later period. At this point, foliar spray fertilizer should be used for supplementation. The main spray of nitrogen and potassium fertilizer, available urea 200 times with potassium dihydrogen phosphate 300 times, foliar spray, 4 to 5 days 1, even more than 3 times. The third is to strengthen the prevention and treatment of cotton bollworm and green-letter locust. Due to the reduction of insect resistance in the later period of cotton, the prevention and control of cotton bollworm should be strengthened. In recent years, the harm of L. lucidum in the latter period has been extremely serious and should be given special attention. When the pests are serious, 40% phoxim EC plus malathion 1000 times spray can be used to achieve good prevention and control effect on L. lucidum. Such as plus 2.5% kiffortin EC 1500 times, can both cure cotton bollworm. The fourth is to remove the buds in time. Late flower buds can no longer form effective bolls. They can only waste nutrition and affect the growth of other normal bolls. They should be removed in time.
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