Efficacy of bioformulations of indigeneous bacterial bioagents strains against bacterial wilt of Curcoma longa L.

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Published: Nov 20, 2015
Keywords:
Bacterial wilt Ralstonia solanacearum Pseudomonas putida Bacillus megaterium Bacillus subtilis, PGPR

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Khonglah, D.
Microbial Ecology Laboratory, Centre for Advanced Studies, Department of Botany, North-Eastern Hill University, Shillong-793022, India
Majaw, S. P.
Microbial Ecology Laboratory, Centre for Advanced Studies, Department of Botany, North-Eastern Hill University, Shillong-793022, India
Kayang, H.
Microbial Ecology Laboratory, Centre for Advanced Studies, Department of Botany, North-Eastern Hill University, Shillong-793022, India
Rao, M. S.
Division of Entomology and Nematology, Indian Institute of Horticultural Research (IIHR), Hessaraghatta lake (PO), Bangalore -560 089, Karnataka, India

Abstract

The present study was undertaken to explore the possibility of using the formulation of indigenous strains of Bacillus megaterium, Bacillus subtilis, Pseudomonas putida, and consortia of these for evaluating the efficacy of these bio-agents on turmeric plant to manage the bacterial wilt of the economically important crop turmeric caused by Ralstonia solanacearum. In an attempt to evolve a biological management of the disease, the formulation of the antagonistic strains of Bacillus megaterium, Bacillus subtilis, Pseudomonas putida, and consortia of these was used for enrichment of farm yard manure for field application. The population dynamics of Ralstonia solanacearum in turmeric rhizosphere soil showed that the crop receiving T1+ application of 5 kg enriched farm yard manure with Bacillus subtilis treatment had the lowest population recovery of the pathogen at 75 Days after transplantation  (13.42x10-4 cfu/g) and at the termination of the experiment (4.99±0.11x10-4 cfu/g). The percent leaf spot incidence at different days after transplanting (DAT) was found to be lowest at 75 Days after transplantation (7.56±0.022%) and termination (10.0±0.023%) in T1+ application of 5 kg enriched farm yard manure with Pseudomonas putida treatment. The yield and yield attributes were found to be best performing in almost all the treatments of the antagonist formulations indicating their potential as PGPM.

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Khonglah, D., Majaw, S. P., Kayang, H., & Rao, M. S. (2015). Efficacy of bioformulations of indigeneous bacterial bioagents strains against bacterial wilt of Curcoma longa L . International Journal of Agricultural Technology, 11(7), 1543–1553. retrieved from https://li04.tci-thaijo.org/index.php/IJAT/article/view/6526
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Vol. 11 No. 7 (2015): November
Section
Original Study
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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