but most of them are nonpathogenic

but most of them are nonpathogenic ones, which provide abundant resources for the biological control to rice diseases. It is a first key step of biological control with antagonistic bacterial to understand the composition of the bacterial population on the rice plant. Much
research work has been done on the gram-negative bacteria, while the research on the gram-positive bacteria has ever been limited to the Bacillus spp., for example, Bacillus subtilis (B916) has been successfully applied to control rice sheath blight caused by Rhizoctonia solani[2, 3].