According to previous study, the pathogen can hydrolyze starch after a week's incubation [22]. However, Guvera and Marsella (1999) did not find this feature in their isolates [8]. Both the cases of starch hydrolysis were observed in this study. The color changes of inoculated media in the tubes from purple to yellow after two, four and six days of incubation, indicated positive reaction (Table 1).