In Brazil, agriculture occupies large areas, and despite extensive cultivation, average productivity per hectare is still very low. Pests are mainly responsible for the reduction in production. Among the main pests that attack agricultural crops, we can mention the caterpillars Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) and Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), as the pests that cause the greatest economic damage to the main agricultural crops in Brazil. This book describes the species, methods of identification, breeding and control.