The antagonistic activities of all the isolates against the pathogen R. solanacearum were screened by the dual inoculation technique ( Bordoloi et al. 2001). Test plates were prepared with nutrient agar (NA) medium mixed with R. solanacearum (106 CFU/ml), and each of the bacterial candidates (107 CFU/ml) was spot inoculated as three replicates. Antagonistic activities were evaluated by measuring the widths of the inhibition zones after 2 days of incubation at 30 °C.