What are the hazards of cotton aphids? How to prevent and cure it?

What harm does cotton aphid have? How to prevent it? please brief us on Cotton aphids suck sap on the back of cotton leaves and tender heads with piercing mouthparts, causing cotton leaves to grow abnormally and shrink to the back. Cotton aphids damage mainly in seedling stage and boll stage, cotton aphids damaged in seedling stage are called seedling aphids, which generally delay the development of cotton seedlings, cause late maturity and yield reduction, and make cotton seedlings unable to continue to develop or even die when seriously damaged. Cotton aphids that harm cotton buds and bolls are called latent aphids, which cause cotton buds and bolls to fall off, and some cause leaves and yield reduction; cotton aphids sometimes harm cotton buds and pollute cotton wool, reducing cotton quality. General cotton aphid control methods are as follows: 1. Agricultural control: cotton and wheat rotation is implemented, and the winged aphids are prevented from migrating to cotton fields by using the wheat barrier effect, and the natural enemies of wheat plants are transferred to cotton plants, thus strengthening the self-control ability of cotton fields. 2. Use of natural enemies: selective insecticides that do not kill natural enemies, such as aphimidone, are used to protect natural enemies from transferring to cotton fields. Cotton field planting sorghum, attracting natural enemies, can be a good control of aphids. After the cotton is sealed in mid-July, if it rains continuously for 5 - 6 days, the temperature rises to above 26℃ after the rain, aphid mold can be popular, and aphid damage can be controlled. The most important thing to protect and utilize natural enemies is not to use drugs casually, and do not use drugs when the ratio of ladles and aphids is below 1:150. 3. Pesticide control: 2500 aphids per 100 seedlings with 3 leaves or 200 aphids per plant with 3 leaves. Cotton aphid occurrence reached the control index is in the stage of spot damage, local targeted spraying should be carried out to avoid large-scale application. Can be used quickly kill Wei, imidacloprid, aphid spirit and other low-toxicity and high-efficiency pesticides. It can also be used to control the third generation cotton bollworm and aphid. Click for more cotton growing technology Click for more food crop growing technology