摘要
Pleurotusfossulatus, a member of oyster mushrooms, was successfully cultivated on rice straw. At least two flushes of fruit body developed at 22 ℃. The first flush of fruit body initiation took place on the 21 st day and second one appeared on 38th day. The biological efficiencies （BE） were found to be 30.8% and 14.6% for first and second flush, respectively. The differentiation pattern of pileus and gills of this mushroom was found to be different from that of other reported species of oyster mushroom. The mushroom （P. fossulatus） took about 20 days for spore formation from primordia initiation and this time span was noted to be highest among all the published reports about any other Pleurotus spp. The BE were 25.9% and 12.5% in first and second flush, respectively when the mushroom was harvested on 18th day （after its initiation of primordia）, i.e., before gill formation. However, the BE was found to be 14-16% lesser in comparison to that harvested after sporulation.
