Five strains of oyster mushroom were tested for various parameters such as spawn run days, pin head initiation days, days taken for first harvest, fruit body/bag, and average weight of fruit body, yield and biological efficiency. Results indicate that highest biological efficiency was recorded in strain R-13-13-05 ( %) followed by strain R-13- 13-07 ( %), R-13-13-03 ( %) and R-51 ( %), respectively, and Lowest BR was observed in strain R-13-13-04 ( %) among all the tested strains. Days required for spawn was minimum in strain R-13-13-05 (only 17 days) followed by R-13-13-04 (only days), strains R-13-13-07, R-51 (only days) and strain R-13-13-03 (only days), respectively. Maximum required days, for spawn run, were recorded in strain R-13- 13-3 (total days). Pin head initiation was first reported in strain R-13-13-5 (within days) followed by strain R-51 (within days), strains R-13-13-04 (within days) and strain R-13-13-03 (within days), respectively. Maximum days, required for pin head initiation, were in strain R-13-13-07 (within days). First harvesting was done in strain R-13-13-05 (after days of spawning) followed by strains R-13-13-03, R-13-13-07, R-51 and R-13-13-04 (after , , , days of spawning, respectively). Among all the strains, tested in the experiment, strain R-13-13-07 recorded highest fruit body weight (per fruit body g) followed by R-13-13-04 ( g), strains R-13-13-05, ( ) and R-51 ( g ), respectively. | Evaluation of high yielding strains of oyster mushroom (Pleurotus spp.)
