Corn armyworm is easy to control, and any general insecticide can be used. Contact insecticides and stomach poisoning insecticides are better. You can choose dimethoxin, Kungfu EC, beta-cypermethrin, chlorpyrifos, or acetamiprid. Amidine and other pesticides are used for control. The spraying period and application method have a great influence on the removal and control effect. The best control period is before the larvae are 3 years old; the amount of pesticide solution per acre is determined according to the size of the corn plant, 30-40 kg per acre before jointing, and 30-40 kg per acre at jointing. Use 50-60 kilograms on the back acres, spray evenly, take care of both the front and back of the leaves, not heavy or leaking, spray again if it rains for 8 hours.