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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


Affiliations
1 AVRDC-The World Vegetable Center - Regional Center for South Asia, ICRISAT Campus, Patancheru 502324, Andhra Pradesh, India
2 Department of Plant Pathology, Maharana Pratap University of Agriculture and Technology, Udaipur 313001 Rajasthan, 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.

Keywords

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

Abstract Views: 242  |  PDF Views: 118

Authors

S. K. Sain
AVRDC-The World Vegetable Center - Regional Center for South Asia, ICRISAT Campus, Patancheru 502324, Andhra Pradesh, India
H. N. Gour
Department of Plant Pathology, Maharana Pratap University of Agriculture and Technology, Udaipur 313001 Rajasthan, India

Abstract


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.

Keywords


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

References