Efficacy of imidacloprid applied in nursery against leaf folder and stem borer in rice
Effectiveness of different treatments with imidacloprid 200 SL were evaluated against leaf folder (Cnaphalocrosis medinalis Guenee) and stem borer (Scirpophaga incertulas Walker) incidence in rice. Sprouted seed soaking at 0.05% for 3hr before sowing offered good protection against leaf folder than other treatments. Foliar application five days before pulling @ 25 g a.i./ha was found effective up to 30 DAT (days after transplantation) in reducing stem borer incidence. Soil application @ 37.5 g a.i./ha 10 days before pulling increased the incidence of stem borer at both 30 and 40 DAT. Foliar spray at higher concentration (37.5 g a.i./ha) recorded much higher population of stem borer.