The inhibitory effects on conidial germination of chitosan
and CHOS with different DPn (80 μg ml−1) against
B. cinerea and M. piriformis are shown in Table 1. All
three isolates experienced a higher degree of inhibition
at 12 vs. 24 h after inoculation (HAI). M. piriformis was
sensitive (in terms of germination inhibition) to a wider
range of CHOS (DPn 9–75) while B. cinerea BC 101
was only markedly inhibited by CHOS DPn 23 and 40.
The results clearly show a size dependency for the
antifungal effect of CHOS.