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Influence of Weather Factors on Rice False Smut Disease Development (Ustilaginoidea virens) in Tamil Nadu

Author: Y. Chandra Sekhar, A. Kamalakannan, C. Gopalakrishnan, S. Paneerselvam, S. Rajesh and P. Santhosh Ganapati

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Abstract

Rice false smut caused by Ustilaginoidea virens (Cooke) Takahashi, is an emerging disease of rice. A field experiment was conducted during Rabi seasons (2019-20) to find out the influence of weather parameters on disease development. The data obtained was analyzed through correlation individually. The first symptom of false smut was appeared on 52nd SMW where disease severity was 7.44 per cent and reached the highest level of 50.67 per cent on 6th SMW during 2019-20. The influence of weather parameters on rice false smut development were correlated, the results were the maximum temperature, relative humidity, rainfall, dew and minimum temperature were showed significant positive correlation, were as wind speed and wind direction did not showed any significant correlation on disease development. Similarly, AUDPC were calculated from 52nd to 6th SMW with 26.05 to 220.03. The influence of weather parameters correlation with rice false smut disease development is very essential for forewarning and calendar based fungicidal schedule to control the false smut incidence and reduce the yield losses in rice crop.

Keywords

Rice false smut, weather parameters, correlation, Tamil Nadu.

Conclusion

To conclude this study, we have studied inflience of weather parameters and correlation with rice false smut diaseas develoment. Based on this to develop the fungicidual schdule in correct time as a prapolactic spray. This will be very helful for controle the disease and ultimatly reduse the yield losses.

References

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How to cite this article

Y. Chandra Sekhar, A. Kamalakannan, C. Gopalakrishnan, S. Paneerselvam, S. Rajesh and P. Santhosh Ganapati (2022). Influence of Weather Factors on Rice False Smut Disease Development (Ustilaginoidea virens) in Tamil Nadu. Biological Forum – An International Journal, 14(4): 543-547.