In the cultivation of insect-resistant cotton, if you do not master the physiological characteristics of insect-resistant cotton and cultivation and management techniques, it is often difficult to achieve the purpose of high yield and high efficiency. Therefore, the author sums up six points for high-yield management from the cultivation practice for reference. First, insect-resistant cotton is not not insect-resistant insect-resistant cotton spraying insecticide is limited and conditional, not absolutely do not need to apply pesticides, but in unusual years more than half the number of non-insect-resistant cotton application decreased. No matter whether it is Bt cotton or physiological insect-resistant cotton, it is basically not to fight drugs with high insect resistance in general years. In the year of abnormal outbreak of pests, it is necessary to spray pesticides properly. For cotton aphids, aphids and other insect pests can not be ignored. Second, insect-resistant cotton seedlings weak insect-resistant cotton during the seedling period, especially the tender seedlings found pests should be treated with pesticides. In late glutinous cotton, such as wheat buckwheat cotton, pests should be observed frequently, and if the locusts are not susceptible to destruction, there will be no head cotton and it is difficult to achieve high yields. For example, in the Yandu County Guo Meng Supply and Marketing Cooperative Research Center, there are two acres of rapeseed cotton. In the first and second generations of cotton bollworm, there was no insecticide in the spraying period, but in wheat and cotton, there was no insecticide, but slight insect pests appeared. It shows that the seedlings are weak in insect resistance and should be planted as early as possible. Third, the application of insect-resistant cotton egg-killing good physiological insect-resistant cotton in the external morphology and the conventional species of eggs, but the growth of obstructed larvae after the obstruction, most of the death, there are still some insects to survive. Therefore, in the year of pest-prone cases, the eggs turn from green to white, and then from white to black, they are sprayed with water, carbidophos, or Raviyn, ovicidal net or worms and net pesticides, and the effect is very good. Genetically engineered cotton such as "Bt Clam III" can eliminate insects and remove eggs. However, in the event of a large-scale outbreak of insects, it is still necessary to apply pesticides to eliminate eggs. Otherwise, adults will eat a cotton boll or leaves to death, so there is some damage to the cotton bolls. Application of pesticides to eliminate eggs, pest control and increase productivity. Fourth, insect-resistant cotton not resistant to insect-resistant cotton grasshoppers is against the cotton bollworm in terms of resistance to aphids. Insect-resistant cotton cannot resist insects. It is reported that in recent years, Skeletonae have emerged in parts of Anhui, Shandong, Henan, and Jiangsu provinces, causing greater damage to the cotton area and easily causing breakage of cotton plants, and insect-resistant cotton is no exception. The cotton field where this kind of insect disaster occurs should be promptly protected with oxygenated dimethoate or monocrotophos pesticide sprayer to ensure stable production and high yield of insect-resistant cotton. Fifth, planting insect-resistant cotton to overcome the ideological parasitizing insect-resistant cotton can be resistant to insects but not equal to the kind of insect-resistant cotton can be ignored, waiting for cotton. Although this will not be an unwarranted harvest, it will have a certain impact on production. In addition to regular snoring and other management, it is also necessary to use medication. The number of medications and the amount of drugs used are reduced by more than 70% compared with the general cotton fields. The performance of the particularly good varieties is only equivalent to 10% of the general non-resistant cotton, which is of great significance in preventing and controlling cotton bollworm. In short, the planting of insect-resistant cotton should be based on local conditions, timely medication, reduce costs, in order to achieve its completeness, achieve high quality, high yield, and high efficiency.
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