The percentage of rotten scales was notably different in the
four substrates (Table 2). Among the four substrates, peat resulted
in the highest rotting level, while sawdust had the lowest level.
After incubation for 100 days, the percentage of bulblet induction
and the diameters and fresh weights of bulblets in sawdust were
notably higher than that in other substrates (Figs. 1 and 2A). By
100 days, independent of the substrate, almost all the outer scales
had become exhausted, and the inner scales became transparent
and senesced from the basal plate. Sawdust was the most optimal
substrate for scale cutting propagation of H. vittatum under our
experimental conditions.