Studies on the Compatibility of Rhizobium with Biocontrol Agent Bacillus subtilis in Urdbean

Bacillus subtilis has been used for many years to control soil-borne plant pathogens and increase plant growth (Turner and Backman, 1991). The increased yield of urdbean (Vigna mungo) due to Rhizobium application has been reported by Balasubramanian and Palaniappan (1983). B. subtilis seed treatment also improved the crop stand and yield (Merriman et al., 1974). Therefore, studies were conducted to assess the effect of seed treatment with antagonists on the nodulation and ischolar_main rot incidence.