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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 6
First page : (299) Last page : (303)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7048

Biosuppression of Root Rot Disease of Gloriosa superba Caused by Macrophomina phaseolina

G. Thiribhuvanamala*, B. Meena and K. Rajamani

Department of Medicinal and Aromatic Crops, Tamil Nadu Agricultural University, Coimbatore
*Corresponding Author E-mail: ragumala2000@gmail.com
Received: 9.11.2018 | Revised: 12.12.2018 | Accepted: 22.12.2018  

 ABSTRACT

The medicinal crop Gloriosa superba is severely affected by root rot disease caused by Macrophomina phaseolina as the pathogen is carried from soil to tubers at 30 days after planting, spreads rapidly under field conditions and later passed on to planting material during storage. Perusal of literature shows very limited research on the management of this disease and more over owing to the medicinal value of this crop, an experiment was planned with treatments including application of biocontrol agents viz., Trichoderma viride, Pseudomonas fluorescens and Bacillus subtilis in different combinations. The results showed that dipping tubers in talc based formulation of Bacillus subtilis @ 0.2% followed by drenching with B. subtilis @ 0.2% on 30 DAP was effective in managing the root rot disease which recorded root rot incidence of 15.5% with 45.7 percent reduction in disease over control with significant increase in number of pods/plant (42.5 and 38.3) and number of seeds / pod (62.7 and 56.6). Similar trend was observed in the treatment with dipping tubers in talc based formulation of P.fluorescens followed by drenching with B. subtilis @ 0.2% on 30 DAP . In both the treatments with B.subtilis and P.fluorescens, increased dry seed yield of 523.2 and 497.9 kg/ha respectively was recorded with B:C of 2.34 and 2.15 respectively  compared to control (362.5 kg/ha).

Key words:  Gloriosa superba, Bacillus subtilis, Root rot, Macrophomina phaseolina.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Thiribhuvanamala, G., Meena, B. and Rajamani, K., Biosuppression of Root Rot Disease of Gloriosa superba Caused by Macrophomina phaseolina, Int. J. Pure App. Biosci.6(6): 299-303 (2018). doi: http://dx.doi.org/10.18782/2320-7051.7048