Wheat, rice, corn. According to the China Agricultural Information Network, armyworms, also called night robbers, belong to the order Lepidoptera and are pests of the family Noctuidae, including armyworms and armyworms. Their larvae feed on leaves, such as wheat, rice, millet, corn, cotton, and beans. The leaves of more than 100 plant crops from 16 families, including vegetables and fruits, are the delicacies of armyworms. The typical characteristics of armyworm larvae are eight-shaped black stripes on the head and five vertical lines of different colors on the back of the body.