The oyster mushroom grown on substrates R80 + WB20 and WS80 + WB20 gave significantly smaller cap diameter than that on substrate C80 + WB20. Oyster mushroom grown on substrate C45 + R45 + WB10 had significantly larger cap diameter than that on substrate R80 + WB20, and on substrate C40 + WS40 + WB20 had significantly larger cap diameter than that on substrate WS80 + WB20. The oyster mushroom on sterilized substrates C45 + R45 + WB10, C30 + R60 + WB10, C40 + WS40 + WB20, C30 + WS50 + WB20 and C80 + WB20 had significantly larger cap diameter compared to non-sterilized same substrate.