Strengthen the fertilizer and water management In the late stage of growth of insect-resistant cotton, the root system is senescent and the leaf function is declining. The management of fertilizer and water should be promptly strengthened, foliar fertilizer should be added, and top-cover fertilizer should be applied. It can be combined with irrigation or rainfall at the end of August and early September. The urea can recover 8 kg of urea and can also be sprayed with 0.3% potassium dihydrogen phosphate and 1%-2% urea solution. Scientifically modulated insect-resistant cotton is weak in the early stage, strong in the flowering and bolling period, concentrated in the bell, and weak in the late period and susceptible to premature senescence. Therefore, the late-stage chemical transformation should be based on soil strength, cotton growth, and weather conditions. For the cotton field with good water and fertilizer conditions and strong growth in the later period, mu is controlled by 3-5 g of dildo-amine, and moderately fertile plots are used less properly. The scientific pruning and insect-resistant cotton is very strong in the whole growth period and has less madness. Therefore, the madness of the upper fruit branch may not go or be reduced. Late pruning can usually be done once every half-month. Strengthen pest prevention and control The timely and reasonable prevention and control of pests and diseases is an important part of increasing the output of insect-resistant cotton. First of all, we must promptly prevent and control blind-cockroaches, red spiders, etc., especially the late blind-cockroach elephants, can easily occur in insect-resistant cotton fields, resulting in a large number of buds off. Due to the habit of nocturnal animals, they should be sprayed with 800-1000 times organic phosphorus pesticides such as methamidophos and phoxim in the evening.
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