International Journal of Plant Sciences

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Efficacy of Pseudomonas fluorescens and Trichoderma viride Based Bioformulation for Management of Bacterial Wilt Disease of Ginger


Affiliations
1 Krishi Vigyan Kendra, Sonitpur (Assam), India
2 Department of Plant Pathology, Assam Agricultural University, Jorhat (ASSAM), India
3 Regional Research Station (A.A.U.), North Lakhimpura (Assam), India
     

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An experiment was conducted to evaluate the efficacy of a consortia formulation of Pseudomonas fluorescens and Trichoderma harzianum for management of bacterial wilt disease of ginger in Assam. Inhibitory effect of the biocontrol agents was evaluated in vitro following dual culture assay method for their efficacy against Ralstonia solanacearum, the ginger wilt pathogen. Quantitative assay of population dynamics of the two antagonists, mass cultured in organic substrates viz., vermicompost (VC) and mustard oil cake (MOC) revealed that the antagonists maintained a high population count up to 120 days of storage at room temperature. Pseudomonas fluorescens recorded highest average population (45.47 x 107cfu/g) when mass cultured in the mixture of VC and MOC, while T. harzianum recorded maximum average population (34.14 x 107cfu/g) when mass cultured in MOC. Bioformulations were further evaluated for their efficacy in ginger wilt management under field condition. Efficacy of one fungicide (Copper oxychloride) and an antibiotic (Streptocycline) was also tested for comparison. Lowest disease incidence (15.63%) was recorded in the treatment of seed treatment (ST) and soil application (SA) of P. fluorescens and T. harzianum consortia mass cultured in the mixture of VC and MOC. It was followed by ST and SA of T. harzianum mass cultured in MOC (21.88%), which was statistically at par with the application of copper oxychloride (26.25%).

Keywords

Antagonists, Bacterial Wilt, Biological Management, Ginger, Substrates.
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  • Efficacy of Pseudomonas fluorescens and Trichoderma viride Based Bioformulation for Management of Bacterial Wilt Disease of Ginger

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Authors

Popy Bora
Krishi Vigyan Kendra, Sonitpur (Assam), India
L. C. Bora
Department of Plant Pathology, Assam Agricultural University, Jorhat (ASSAM), India
P. C. Deka
Krishi Vigyan Kendra, Sonitpur (Assam), India
Bikram Borkotoki
Regional Research Station (A.A.U.), North Lakhimpura (Assam), India
A. K. Sharma
Krishi Vigyan Kendra, Sonitpur (Assam), India
H. S. Dutta
Krishi Vigyan Kendra, Sonitpur (Assam), India
Debahaj Buhagohain
Krishi Vigyan Kendra, Sonitpur (Assam), India

Abstract


An experiment was conducted to evaluate the efficacy of a consortia formulation of Pseudomonas fluorescens and Trichoderma harzianum for management of bacterial wilt disease of ginger in Assam. Inhibitory effect of the biocontrol agents was evaluated in vitro following dual culture assay method for their efficacy against Ralstonia solanacearum, the ginger wilt pathogen. Quantitative assay of population dynamics of the two antagonists, mass cultured in organic substrates viz., vermicompost (VC) and mustard oil cake (MOC) revealed that the antagonists maintained a high population count up to 120 days of storage at room temperature. Pseudomonas fluorescens recorded highest average population (45.47 x 107cfu/g) when mass cultured in the mixture of VC and MOC, while T. harzianum recorded maximum average population (34.14 x 107cfu/g) when mass cultured in MOC. Bioformulations were further evaluated for their efficacy in ginger wilt management under field condition. Efficacy of one fungicide (Copper oxychloride) and an antibiotic (Streptocycline) was also tested for comparison. Lowest disease incidence (15.63%) was recorded in the treatment of seed treatment (ST) and soil application (SA) of P. fluorescens and T. harzianum consortia mass cultured in the mixture of VC and MOC. It was followed by ST and SA of T. harzianum mass cultured in MOC (21.88%), which was statistically at par with the application of copper oxychloride (26.25%).

Keywords


Antagonists, Bacterial Wilt, Biological Management, Ginger, Substrates.

References