Usually I need 6-7 days to get 106-107 spores/ml. But for industrial production its very long time. I want to produce maximum short duration. so I need suitable media with cheapest sources. Can anyone suggests me which media may I try? another problem is during fermental production I have noticed huge foam produced by trichoderma which blocked air flow ( inlet and out let). May I get any antifoam -organic/inorganic- to control foam?