Extent of suppression of yellow stem borer, Scirpophaga incertulas, Walker population by insecticides in field of scented local Paddy

All the treatments were significantly effective in checking stem borer infestation causing to decrease in both dead heart (DH%) and white head (WH%) number. Numerically least damage was noted for imidacloprid 17.8 SL (100 ml/ha), followed by carbofuran 3G (30 kg/ha), fipronil 0.3G (750 ml/ ha), monocrotophos 36 WSC (1125 ml/ha), propenphos 50 EC (500 ml/ha), bifenthrin 10 EC (500 ml/ ha) and chlopyriphos 20EC (1875 ml/ha) in ascending order. The control plot has registered 6.1% DH and 4.3% WH, respectively. In consideration of yield increase over control, maximum yield was registered for imidacloprid 17.8 SL, respectively followed by, carbofuran 3G, fipronil 0.3G and monocrotophos 36 WSC in descending order.