Impact of Epidemiological Factors on the Incidence of Charcoal Rot of Sesamum incited by Macrophomina phaseolina

Author: Kiran Choudhary, Ashok Kumar Meena, Kewal Chand, Yogita Nain and Shivam Maurya*

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Abstract

Charcoal rot of sesame incited by Macrophomina phaseolina is one of the foremost yield-reducing factors in sesame (Sesamum indicum L.). In the present studies which were carried out at the experimental farm of SKRAU, Bikaner during kharif 2017. The study focused on relationship of different meteorological variables with the development of charcoal rot of sesame disease under field conditions. A positive and non-significant correlation was observed between disease and temperature while a significant, negative correlation was noticed between disease development and relative humidity. Assessment of yield losses in sesame due to M. phaseolina was done at the capsule formation stage. The data also revealed that maximum relative humidity was more correlated with the disease intensity as compared to the minimum relative humidity in all three varieties. Sunshine hours exhibited a negative and non-significant correlation with disease progression. Although the total rainfall showed a positive co

Keywords

Charcoal rot, Macrophomina phaseolina, Sesame, and Weather parameters.

Conclusion

The disease progression was observed relatively faster from 24th August to 5th September in all three cultivars. The mean of three varieties also showed disease intensity ranged from 21.47 to 33.88 percent in three test sesame cultivars. During this period i.e., 24th August to 5th September the minimum to maximum temperature ranges were 29 to 39.8°C and 24.5 to 26.5°C, respectively, while the maximum and minimum relative humidity prevailed 60.0 to 92.0 and 39 to 81 percent, respectively. Relative humidity maximum (X3) was found significantly positively correlated with the charcoal rot intensity in all three varieties in the crop season. The maximum and minimum temperatures were found negatively correlated with the progression of disease intensity during the season. The Charcoal rot intensity progressively increased during the observation period i.e. 10th August to 5th September in all three varieties in the crop season. The disease progression was faster from 24th August to 5th Septe

References

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How to cite this article

Kiran Choudhary, Ashok Kumar Meena, Kewal Chand, Yogita Nain and Shivam Maurya (2022). Impact of Epidemiological Factors on the Incidence of Charcoal Rot of Sesamum incited by Macrophomina phaseolina. Biological Forum – An International Journal, 14(1), 264-268.