“…In an attempt to reduce costs and obtain large quantities of viable propagules, natural substrates, such as millet, corn kernels, wheat grain (Damir, 2006), tapioca flour, sweet potato, pumpkin and papaya extracts (Hepburn, 1985), mixtures of rice bran and husks, barley (Dorta et al, 1990;Nelson et al, 1996) and other substrates, have yielded promising results for the production of B. bassiana. However, these substrates were supplemented to ensure growth and sporulation of the fungus effectively.…”