How to control cotton seedling aphid
The suitable temperature for the occurrence of cotton seedling aphid is 18 ℃ ~ 25 ℃, but the temperature rises rapidly after rain, which is very suitable for the occurrence of seedling aphid.
1. Agricultural control cotton
Root out weeds, strengthen the management of water and fertilizer, promote the early emergence of cotton seedlings, pull out aphids with interseedling and fixed seedlings, and take them out of the field and burn them.
2. Chemical control
Before 3 true leaves, when the plant rate of rolled leaves reached 5% to 10%, and after 4 true leaves reached 10% to 20%, 10% imidacloprid wettable powder 15 grams per mu was used to evenly spray 30 kg of water, or 10% acetamiprid EC 3000 times, or 20% acetamiprid wettable powder 1500000 times, or 20% thiocarbofuran EC 2000kg 4000 times. When spraying, we should focus on the heart leaves of cotton seedlings and pay attention to turning the sprinkler to spray to the back of the leaves.
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Agronomic matching techniques of drip Irrigation under plastic Film for Cotton
Drip irrigation technology under plastic film is a combination of drip irrigation technology and plastic film mulching cultivation technology. water is supplied through a controllable pipeline system, and after the fusion of water and fertilizer, drip by drop can be transported uniformly, regularly and quantitatively, infiltrating the root development area of crops. always keep the root soil loose and the best water-bearing state. The evaporation among crops is reduced and the utilization rate of water is improved. First, the irrigation system buried drip irrigation, a total of 175.48 million cubic meters of water. Drip water 9 times. Precision drip irrigation consumes a total of 177.84 million cubic meters. Drip
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Key points of cotton seedbed management
During the period of cotton sowing this year, the weather is good and the light is sufficient. At present, a large area of cotton has been fully planted and has entered the stage of seedbed management. Specifically to grasp the following points: 1, every 10 square meters of seedling bed with "Zaofa No. 1" 3 ml plus 0.6 kg of water spray, 8-10 days later spray again, in order to prevent tall seedlings, cultivate strong seedlings. 2. After finishing the seedlings, choose sunny weather and dry the bed to disperse dampness and spray medicine to prevent disease at the same time. 3. for a small number of dry and stiff cotton seedlings that are short of water and less fertilizer, replenish fertilizer and water in time, ventilate and then uncover the film to replenish water before 9 o'clock in the morning, and use urine.
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