The field experiments were carried out in the farmer field at Jadamangalam, Trichy during rabi of 2019-2020 and kharif of 2020. The results of trap catches revealed that the peak activity of S. frugiperda on maize observed from 42nd MSW (2019) to 3rd MSW (2020) where the population was in the range from 2.63 to 13.2 moths/trap/week and the maximum number of moths 13.2 moths/trap/week were trapped in 43rd MSW during rabi season. During kharif, the peak activity period of S. frugiperda was observed from 37 to 42 MSW where the population range of 5.20 to 12.1 moths/ trap/ week, where the maximum of male moths 12.1/trap/week were trapped in 37th MSW. The results of correlation studies showed that trap catches of S. frugiperda exhibited positive correlation with maximum temperature, minimum temperature and rainfall, while negatively correlated with relative humidity during rabi 2019. During kharif 2020, trap catches were negatively correlated with maximum temperature, minimum temperature and relative humidity, while positively correlated with rainfall during kharif 2020.