Different extracellular filtrates were obtained from the 135 and 160 strains as described in Section 2, at 12, 24 and 60 h, which correspond to the logarithmic early stationary, and late stationary phases, respectively. The filtrates obtained inhibited the growth of the fungus (Fig. 2). The samples with the highest activity were obtained from strain 160 in the stationary phase (Table 1).