European Journal of Biotechnology and Bioscience

European Journal of Biotechnology and Bioscience


European Journal of Biotechnology and Bioscience
European Journal of Biotechnology and Bioscience
Vol. 3, Issue 8 (2015)

Occurrence of sesame root rot disease in Cuddalore district of Tamil Nadu and analysis of the variability in cultural characteristics and pathogenicity among isolates of Macrophomina phaseolina (Tassi) Goid


P Balabaskar, P Renganathan, K Sanjeevkumar

Among the diseases affecting Sesame, root rot caused by Macrophomina phaseolina is the most serious one. In the recent years, the incidence of this disease poses great problems at such magnitude that the farmers are inclined to think about the cultivation of other crops in place of sesame. Hence, the present study was taken up to assess the extent of damage caused by root rot disease in Cuddalore district of Tamil Nadu, India. Also, the variability in the cultural characteristics and pathogenicity among the isolates of M. phaseolina was studied. The survey in different locations of Cuddalore district revealed endemic nature of the root rot disease incidence. Among the different locations of Cuddalore district surveyed for sesame root rot incidence, Kothattai (MP6) registered the maximum incidence of the disease (38.75%) followed by Virudhachalam (MP13) with 36.68 per cent. In general, the crop grown under rainfed conditions showed more root rot incidence when compared with the crops grown under irrigated conditions. In respect of soil type, sandy soil had more root rot incidence than clay and clay loam soil. The isolates collected from different locations showed varied levels of pathogenicity. All the thirteen isolates of the root rot pathogen M. phaseolina showed variations with regard to mycelia growth, sclerotial size and production. The isolate (MP6) collected from Kothattai was found to be more virulent.
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How to cite this article:
P Balabaskar, P Renganathan, K Sanjeevkumar. Occurrence of sesame root rot disease in Cuddalore district of Tamil Nadu and analysis of the variability in cultural characteristics and pathogenicity among isolates of Macrophomina phaseolina (Tassi) Goid. European Journal of Biotechnology and Bioscience, Volume 3, Issue 8, 2015, Pages 55-59
European Journal of Biotechnology and Bioscience