In order to identify antibiosis between rhizobacterial isolates and M. oryzae, 18 isolates of rhizobacteria (19 treatments including control) (Table 2) were selected based on the growth stimulation results for an in vitro assay using a completely randomized design with three replications. Five millimeter disc of M. oryzae mycelium
was transferred to the central part of a Petri dish containing potato dextrose agar (PDA). Each isolate was streaked on four extremes of the plate forming a square around the M. oryzae mycelium.
The evaluation was done by measuring the radial growth of M. oryzae.
The data were statistically analyzed and the means were compared by Tukey test (P = 0.05) using the software SPSS, version 16.0.