Cotton pests: what are cotton aphids?

What are cotton aphids? What methods can be used to control cotton aphids? Please introduce that cotton aphids mainly suck sap. Cause leaf curl, leaf back glossy, serious leaf withered and yellow shedding, bud and boll damage, easy to drop bud, affecting the development of cotton plant. Cotton aphids generally occur from emergence to the end of June, from mid-May to mid-late June before budding, and enter the peak period of damage. Adapt to the low temperature; when the temperature is higher than 27 ℃, the reproduction is inhibited and the insect population decreases rapidly. The summer aphid occurs from mid to late July to August, adapting to the high temperature, and propagates in large numbers from 27 ℃ to 28 ℃. The population decreases when the average temperature of the day is higher than 30 ℃. The control methods of cotton aphids can be carried out with reference to the following methods: (1) seed coating: imidacloprid is coated with imidacloprid before sowing, 2 kilograms of cotton seeds are packed every 10 milliliters, and the period of validity for the control of cotton aphids is more than 40 days. This is the most economical and effective measure to control cotton aphid at present.