Population Dynamics of Spotted Stem Borer, Chilo partellus (Swinhoe) and Pink Stem Borer, Sesamia inferens (Walker) on Rabi Sorghum

Abstract

During the rabi season, the peak populations of Chilo partellus and Sesamia inferens were observed under specific weather conditions: no rainfall, maximum temperatures of 32.8°C and 31.9°C, minimum temperatures of 16.7°C and 16.2°C, morning relative humidity of 75.83% and 81.47%, afternoon relative humidity of 43.5% and 48.1%, and wind speeds of 20 km/h and 19.7 km/h, respectively. Correlation analysis revealed that the larval population of C. partellus infesting rabi sorghum had a significantly positive correlation with morning relative humidity and a significantly negative correlation with wind speed. In contrast, the larval population of S. inferens showed a positive but non-significant correlation with rainfall, morning relative humidity, and afternoon relative humidity. By monitoring specific weather conditions, such as humidity and wind speed, and understanding their impact on pest populations, effective interventions can be designed to mitigate the damage caused by C. partellus and S. inferens. This knowledge is crucial for improving crop yields and ensuring sustainable agricultural practices.