The cotton aphid sucks the liquid juice on the back of the cotton leaf and the tender part by a sucking mouth device, so that the cotton leaf grows abnormally and curls toward the back side. The cotton aphid is mainly in the seedling stage and the bud and boll stage. The cotton aphid which is harmful in the seedling stage is called the nursery. It is generally harmful to delay the development of cotton seedlings, resulting in late maturity reduction. When the damage is serious, the cotton seedlings cannot continue to develop or even die; the buds are harmful. The cotton aphid is called Fuxi, which causes the bud to fall off, and some causes the deciduous to reduce the yield. In the cotton boll opening period, sometimes the cotton aphid is called the autumn scorpion, which pollutes the cotton wool and reduces the cotton quality.
Control method:
Agricultural control. The cotton-wheat rotation is implemented, and the wheat barrier function is used to prevent the winged carp from moving to the cotton field, and the natural enemies of the wheat plant are transferred to the cotton plant, thereby strengthening the self-control ability of the cotton field.
Use natural enemies. When the wheat field is treated, it uses selective insecticides that do not kill natural enemies, such as Kangwei, to protect natural enemies from transferring to cotton fields. Cotton fields are inserted into sorghum, attracting natural enemies, and can control Fuxi. After the cotton is closed in mid-July, if the continuous rainfall is 5-6 days, the temperature will rise to above 26 °C after the rain, and the mold can be popular to control the mites. The most important thing to protect and use natural enemies is not to use the medicine casually. Do not use the medicine when the scoop is below 1:150.
Chemical control. The number of 3 leaf stalks in the nursery was 2,500, or the leaf-rolling plant was used as the control index. The average number of sputum in the upper, middle and lower leaves of Fuxi was 200. When the occurrence of cotton aphid reaches the prevention and control index, it is in the stage of spotting damage, and local targeted spraying should be carried out to avoid large-area medication. Low-toxic and high-efficiency insecticides such as quick-killing, imidacloprid and scorpion can be used together, and the three-generation cotton bollworm can also be combined to prevent and treat Fuxi.
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