Chitosan has been shown to be fungicidal against several fungi, including B. cinerea (Ben-Shalom et al., 2003). The min- imum inhibitory concentration (MIC) reported for B. cinerea was 10 ppm (Rabea et al., 2003). The MICs reported for specific target organisms range from 0.0018% to 1.0% and are influenced by a multitude of factors such as the pH of the growth medium, the degree of polymerization of chitosan, and the presence or absence of interfering substances such as lipids and proteins (Roller and Covill, 1999; Rhoades and Roller, 2000).