Clear or clean the pastoral. Cotton bollworms, red spiders, locusts, thrips, and blind stink bugs can overwinter on the dead branches, fallen leaves, bells and weeds left over from the cotton fields, clean up the pastoral areas, remove dead branches, defoliates, and drop bells to eradicate cotton fields. The weeds around can effectively eliminate the above-mentioned overwintering pests. Eradication should be centralized, burned in time or buried in a timely manner. Turn over to turn the soil deep. Cotton bollworms, ground tigers, tawny moths, bridge-building moths, etc. in the soil in winter, can be implemented to turn soil to kill. Turning soil can also increase soil permeability, accelerate soil maturation, and increase soil fertility. The soil is required to have a depth of 30-40 cm. The topsoil is turned to the bottom, and the subsoil is turned to the top. The large earth blocks will not be broken to facilitate winter weathering. Irrigate and irrigate the insecticide. Irrigation on the basis of earth turning can more effectively kill overwintering pests in the soil. According to the experiment, after the soil is poured and poured, the mortality rate of overwintering bollworms in the soil can reach more than 90%. Irrigation should be carried out on the 39th day, and it should be thoroughly perfused. The irrigation amount per mu is 80-120 cubic meters. Slightly more irrigation of the clay, the loam can be slightly less irrigation. The irrigation method is suitable for furrow irrigation, so that the water is slowly immersed in the chamber, avoid flood irrigation, irrigation can also enhance the water storage capacity of the soil.
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