Efficacy of Isolated Bacteria in In vitro Inhibition of Xanthomonas axonopodis Pv. Cyamopsidis and Prevention of Bacterial Leaf Blight of Cluster Bean in the Field


  • AVRDC - The World Vegetable Center South Asia, Regional Center for South Asia, Andhra Pradesh, 502324, India
  • Maharana Pratap University of Agriculture and Technology, Department of Plant Pathology, Udaipur, Rajasthan, 313001, India


Twelve isolates of plant growth promoting rhizobacteria (PGPRs) were tested for their efficacy against bacterial blight of cluster bean (Cyamopsis tetragonoloba (L.) Taub.) caused by Xanthomonas axonopodis pv. cyamopsidis in laboratory and field conditions. The isolates PGPR-1, PGPR-4 (Bacillus subtilis), PGPR-12 and PGPR-7 (Pseudomonas fluorescens) showed maximum in vitro bacterial growth inhibition, increased the seed germination (more than 98%) and increased plant vigour. Under field conditions, PGPR-12 (P. fluorescens), PGPR-5 (B. subtilis), PGPR-4 (B. subtilis) and PGPR-7 (P. fluorescens) resulted in low of per cent disease index and in that order increased plant yield compared to other PGPR strains.


Disease Management, Cyamopsis tetragonoloba, Xanthomonas axonopodis Pv. Cyamopsidis, PGPRs.

Subject Discipline

Agriculture Sciences

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