The research aims to determine the effective concentration of Chromolaena odorata L. leaf powder extract on the mortality of laboratory-reared fall armyworm (Spodoptera frugiperda). The study was conducted at the Plant Pest Laboratory, Faculty of Agriculture, University of Riau, Bina Widya Campus KM 12.5, Pekanbaru, from January to March 2024. The experiment followed a completely randomized des…