The success of the biological control agents of insect pests depends not only on their experimentation and analysis, but also on the success of their mass production. The biological control strategy using entomopathogenic fungi like Beauveria bassiana, Metarhizium anisopliae, Verticillum lecanii and Paecilomyces fumosoroseus can only be successful if practical and economic methods of mass multiplication are available. Broken rice grains was evaluated for solid state multiplication of B. bassiana, M. anisopliae, V. lecanii and P. fumosoroseus. Mass multiplication of these bio-control agents were studied using different media to evaluate parameters like dry extraction of conidia, spore yield, spore count and germination. The influence of photoperiod and incubation time in the production of conidia were also evaluated. These studies indicate broken rice as the most productive substrate for conidial production of the four fungal genera, with a yield of 4.2x1010, 6.5x1010, 5.9×10⁹, 7.8×10⁹ conidia respectively.