Potato Dextrose Agar, Saboured Dextrose Agar, Saboured Dextrose Yeast Agar, Malt Extract Agar, Czepeck Dox Agar Media were evaluated for mass production of the Beauveria bassiana (Balsamo) Vuillemin strains. Results show Potato Dextrose Agar is the most suitable substrate for examined fungi as it yielded highest conidial count (6.5×10⁶ conidia/g) and colony forming unit (8× 10⁸cfu/g) where as Saboured Dextrose Agar recorded minimum conidial count (12.2×10¹²cfu/g) and colony forming unit (9.5×10⁹conidia/g). This study also shows the preparation of formulations of B. bassiana on best substrate and its viability at different storage temperature. Results show Talc based formulation at refrigeration temperature as the best and the cells were viable up to three months of storage.