Seasonal Dynamics of Major Insect Pests of Rice Crop and Impact of Various Abiotic Factors on Their Incidence

A field experiment was carried out at research cum instructional farm to study the seasonal dynamics of major insect pests of rice, during Kharif, 2022. The peak population and infestation of major insect pests viz., rice hispa (19.56 per cent per hill), yellow stem borer dead heart incidence (11.98 per cent per hill) was recorded during 37th SMW whereas, yellow stem borer white ear heads incidence (16.17 per cent per hill) was recorded during 43rd SMW, rice leaf folder (12.96 per cent per hill) and brown planthopper (20.97 insects per hill) were recorded during 40th SMW. The hispa damage showed significant positive correlation with minimum temperature. The dead heart incidence of yellow stem borer had significant positive correlation with minimum temperature where as white ears incidence had showed significant negative correlation with minimum temperature, evening relative humidity and significant positive correlation with sunshine hours. The leaf folder damage showed significant positive correlation with evening relative humidity. The population of brown planthopper had significant negative correlation with rainfall.