Seasonal incidence of rice yellow stem borer, Scirpophaga incertulas (walker) in Tamil Nadu

The seasonal incidence of rice yellow stem borer, Scirpophaga incertulas (Walker) was studied at the Agricultural Research Station, Tamil Nadu Agricultural University, Thirupathisaram, Kanyakumari district during 2008–09, 2009–10 and 2010–11. The results revealed that the infestation was found during August-September and December-February, reaching the peak in January-February, and without any infestation in other months. Studies on correlation with weather parameters showed a significant positive correlation with relative humidity and negative correlation with minimum temperature and rainfall.