ABSTRACT Spodoptera frugiperda J.E Smith is the primary pest that can reduce maize output. Soursop leaf is a botanical pesticide that can be used to control it (Annona muricata L.). The purpose of this study was to determine the most effective concentration of soursop leaf powder extract on fall armyworm mortality (Spodoptera frugiperda J.E Smith). This research was conducted out in the Pl…