The ability of K. macalpineae and P. tolaasii to inhibit
mycelium growth of Pleurotus is a great threat to the
cultivation of P. ostreatus. However, Figure 1 and 2 show
the gradual increase of the percentage inhibition of K.
macalpineae against mycelium of P. ostreatus from 33.3
% at 24 h to 75.0 % at 168 h in the conventional streak
method. Also the percentage of inhibition of P. tolaasii
against the mycelium of P. ostreatus increased gradually