For the late-deployment of cotton fields, measures should be taken according to local conditions, and classification management should be carried out according to the causes: First, delaying the sowing and transplanting, resulting in delayed cotton fields, management measures should be taken to promote the promotion, control and integration, and promptly extermination and cultivator should be combined. For cultivator top dressing, topdressing should pay attention to increase phosphorus and potassium fertilizer input, and balance fertilization. If fertilizer is not yet applied, 25 kg of compound fertilizer in Mushi, 10 to 15 kg of potash fertilizer and urea will be concentrated in the middle of the big line. To carry out chemical control, pruning, promotion, and control, apply to the South after June 1st transplanted wheat buckwheat cotton, rapeseed cotton field and the northern summer sowing cotton. From late July to mid-August, chase the compound fertilizer and urea each by 5 to 10 kg. The time for the topping may be delayed by 3 to 5 days according to local customs. Second, in the case of late-onset cotton caused by drought, low temperature and rainy weather in local areas during the seedling period, it should be promoted mainly and timely fertilizer should be applied. Third, for excessive vegetative growth, due to vegetative growth, reproductive growth disorders, resulting in delayed cotton fields, should be dominated by control. This type of cotton fields are often caused by excessive nitrogen fertilizers, insufficient P and K, resulting in too many branches and fruit branches; timely pruning and good chemical control are required. Density, to remove all the leaves, and remove the lower part of the big leaves, while the injection of 2% to 3 grams of acre amine, a mad trend can be increased to 4 grams, and spraying potassium dihydrogen phosphate to promote Its transformation to reproductive growth, such as the bell after the appropriate top dressing. Fourth, due to lack of light, high temperatures, cotton plants are weak, internodes longer, lighter leaves, showing the phenomenon of defertilization of the cotton fields, fertilizer, chemical control, should be carried out at the same time.
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