Screening of Cluster Bean Genotypes/ Varieties for Resistance to Xanthomonas axonopodis pv. cyamopsidis Using Two Methods of Inoculation

Clusterbean [Cyamopsis tetragonaloba (L.) Taub is an arid and semi-arid legume crop belonging to the family leguminaceae. It is a drought enduring leguminous crop because of its profound tap rooting system and has high capability to get well from water stress. Total fifty-nine varieties/genotypes of clusterbean were screened under artificial Inoculation field conditions at College Research Farm, College of Agriculture, Bikaner against bacterial blight disease during the Kharif season of 2018 and 2019. Two alternative inoculation techniques-seed inoculation and foliar sprays of bacterial suspension were employed to test for resistance to Xanthomonas axonopodis pv. cyamopsidis bacterial blight infection. (2.5x108cfu/ml). Out of 59 varieties, only one variety RGC-1066 found resistant against bacterial blight disease, 17 were found moderately resistant, 17 were moderately susceptible and 24 varieties were found susceptible. No one variety found highly susceptible against bacterial blight.