Effect of Weather Parameters on Red Rot of Sugarcane

Author: Mitalkumari Ishvarbhai Patel, Priya John, Shivangi S. Kansara and Kotramma C. Addangadi

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Abstract

Numerous factors contribute to the disease's incidence, and certain environmental factors are also important in identifying the disease's cause and severity. Therefore, the current study was conducted to determine how weather affects the prevalence of red rot disease, which is caused by Collectotrichum falcatum Went. In South Gujarat, red rot has become a significant issue for sugarcane cultivation. Weather plays an important role in disease development. Minimum temperature, morning and evening relative humidity, rain fall and rainy days are more favourable for the progress of the red rot during 27th to 32th MSW (July to August) at Navsari, Gujarat. The stepwise regression analysis highlights that including additional predictor variables improved the model's ability to explain the variance in the disease incidence of red rot. During 2021-22 and 2022 to 2023, the final model added with evening relative humidity to the previous variables (rainy days and wind speed), showed an R² value of 0.712 indicating that the inclusion of all three predictors explains 84.4 per cent of the variation in the red rot incidence

Keywords

Sugarcane, red rot, Colletotrichum falcatum, weather parameter, correlation

Conclusion

Around the world, sugarcane production is still seriously threatened by the red rot disease. Thus, it can be said that the development and occurrence of red rot disease in sugarcane are significantly influenced by the various weather factors. Minimum temperature, morning and evening relative humidity, rain fall and rainy days are more favorable for the progress of the red rot during 28th to 34th MSW(July to August), respectively also consider as main peak period of the red. Correlation matrix worked out showed that minimum temperature (0.485**), morning relative humidity (0.583*), evening relative humidity (0.755**), rain fall (0.709**) and rainy days (0.774**) was highly significantly and positively correlated with red rot incidence. Wind speed (0.047) was positively correlated. All these factors played an important role in the development of disease. The regression coefficient based on stepwise regression analysis for per cent red rot incidence of sugarcane with evening relative humidity to the previous variables (rainy days and wind speed), showed an R² value of 0.712. This indicates that the inclusion of all three predictors explains 84.4 per cent of the variation in the red rot incidence. Thus it can be concluded that the different weather parameters i.e. rainy days, wind speed , rain fall and evening relative humidity found to play an important role in the disease development and incidence of red rot disease in sugarcane

References

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How to cite this article

Mitalkumari Ishvarbhai Patel, Priya John, Shivangi S. Kansara and Kotramma C. Addangadi (2024). Effect of Weather Parameters on Red Rot of Sugarcane. Biological Forum – An International Journal, 16(10): 67-74