The best choice of artificial spray is Shandong Guardian SW-16 type manual sprayer, 11001 type fan nozzle, 100 mesh filter, spray volume 100-150 litres/ha, and spray pressure 2-3 atmospheres. . Artificial pesticides should be sprayed along the ridges and sprayed once at a time. The spraying pressure, the height of the sprayer and the ground, and the walking speed should ensure even spraying.