Among different six media, Potato dextrose yeast broth emerged as a best medium for mass production of B. bassiana and recorded highest 10.50 gms /50ml of mat formation at 7 days after inoculation. At 14 days after inoculation it shows 13.41 gms/50ml of mat formation while after 21 days after inoculation shows highest growth of mat of 15.67 gms/50ml. Potato dextrose broth as the second best medium which produced 9.37 gms/50ml of mat formation at 7 days after inoculation. At 14 days after inoculation it shows 11.21 gms/50ml of mat formation where as at 21 days after inoculation shows 13.11 gm/50ml of mat formation.