In vitro Efficacy of Microbial Bioagents Against Rhizoctonia bataticola (Taub.) Butler, Inciting Dry Root Rot Disease of Soybean

Author: Ajesh B.R.*, T.K. Narute, S.V. Kolase, S.B. Latake and R.T. Gaikwad

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Abstract

Dry root rot of soybean (Glycine max (L.) Merril) incited by Rhizoctonia bataticola (Taub.) Butler, is one of the most destructive diseases of soybean during recent years causing substantial economic losses (70 to 80%) to soybean growers. The study aimed at minimizing the indigenous usage of chemical fungicides and adopting the strategy of biological control for management of this devastating fungus. In this study, dual culture technique was used to see how effective various bioagents were at managing R. bataticola. All the nine bioagents tested in vitro had a significant inhibitory impact on the pathogen. Trichoderma viride produced maximum mycelial inhibition of the pathogen (86.30%) followed by T. virens (82.97%), Aspergillus niger (81.48%), T. atroviride (79.63%), T. hamatum (78.52%), T. harzianum (77.03%), Pseudomonas fluorescens (73.70%), Bacillus subtilis (70.74%), and T. koningii (69.63%).

Keywords

bioagents, biological control, dry root rot, Rhizoctonia bataticola, soybean.

Conclusion

The ability of polyphagous, soil inhabiting R. bataticola to survive for longer periods as sclerotia in the soil makes its management a difficult chore. However, the current study found that using bioagents aids in the effective management of soybean dry root rot disease. Trichoderma viride was found to be the most effective bioagent, followed by T. virens with mycelial growth inhibition percentage of 86.30 and 82.97 respectively. T. koningii, on the other hand, was shown to be the least effective against pathogen. Use of bioagents greatly lower the disease incidence. Farmers benefit from the use of bioagents not only in terms of lowering cultivation costs, but also in terms of increasing yields. The current study advises more trials to be undertaken in naturally infected soybean fields to encourage the use of bioagents as an eco-friendly technique for the management of the dry root rot disease and thereby, lower the cost of cultivation by avoiding unsustainable chemical practices.

References

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How to cite this article

Ajesh B.R., Narute, T.K., Kolase, S.V., Latake, S.B. and Gaikwad, R.T. (2021). In vitro Efficacy of Microbial Bioagents Against Rhizoctonia bataticola (Taub.) Butler, Inciting Dry Root Rot Disease of Soybean. Biological Forum – An International Journal,