ABSTRACT Helicoverpa armigera is the main pest of Zea mays. Biological control using the Beauveria bassiana was effective in controlling H. armigera. B. bassiana can be made in the form of a flour formulation by adding a carrier material, namely bran flour. The purpose of this study was to obtain the best amount of bran flour as a carrier in the formulation local B. bassiana flour and included…