Studies on the Factors Affecting Pathogenicity of Root Rot Caused by Rhizoctonia bataticola in Jatropha curcas

The epidemiological factors viz. inoculum density, inoculum age, inoculum depth and soil moisture affected the ischolar_main rot development in Jatropha. The inoculum density of 20 g kg^-1 soil resulted in 42.22 per cent pre emergence mortality (PEM) and 23.15 per cent post emergence mortality (POEM). The highest PEM (37.78 %) and POEM (21.48 %) were recorded in five days old culture. Inoculum depth at 5 cm induced 42.22 per cent and 30.55 per cent PEM and POEM, respectively. Irrigation schedule at 20 days interval showed maximum PEM (41.66 %) and POEM (34.92 %).