Prevalence and characterization of Xanthomonas axonopodis pv. cyamopsidis causing bacterial blight of clusterbean in the semi-arid region of North Gujarat Joshi SH1,2, Purohit J1,*, Chattopadhyay Anirudha3, Joshi Bhavesh M4 1Department of Plant Pathology, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar - 385 506 2Department of Plant Pathology, Navsari Agricultural University, Navsari-396450 3Pulses Research Station, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar-385 506 4Department of Microbiology, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar-385 506 *Corresponding author's e-mail: jyotikap@sdau.edu.in
Online Published on 12 August, 2024. Abstract The bacterial blight caused by Xanthomonas axonopodis pv. cyamopsidis is the most widespread and destructive disease of clusterbean. The present study aimed to survey the major clusterbean growing areas, expanding in five districts i.e., Banaskantha, Patan, Sabarkantha, Mehsana and Aravali of North Gujarat. The study found that bacterial blight disease is prevalent in Idar, Ambaji, Danta, Sanali, Khedbramha, Shamalaji, Patan, Bhiloda, Visnagar, Deesa and Amirgadh. The highest mean disease incidence (28.44%) was recorded in Idar, Sabarkantha. Based on the gram straining it was observed that the test bacterium was gram-negative and rod-shaped. Further, the biochemical tests, such as starch hydrolysis, gelatin liquefaction, hydrogen sulphide production, catalase, and acid production from different sugars viz., sucrose, maltose, and dextrose showed a positive reaction, except, acid production from mannitol was negative. Based on the morphological, biochemical, and pathogenic characteristics, the pathogen was identified as Xanthomonas axonopodis pv. cyamopsidis. Top Keywords Bacterial blight, Cluster bean, Biochemical characterization, Disease survey, Xanthomonas axonopodis pv. cyamopsidis. Top |