Abstract

Field experiments were conducted in rice crop during kharif season of 2013–14 at Nawgaon and Pendarwa Block-Bilha, Bilaspur, Chhattisgarh (India). Pheromone trap and some insecticides i. e. fipronil, chlorantraniliprole, cartap hydrochoride and neem seed kernel extract were tested against rice stem borer. Least damage was noted in the treatment (Application of chlorotraniprol 0.5 GR @ 10 kg/ha after 25 days after transplanting+spay chlorotranipro l18.5 SC @ 60 ml/acre at booting stage) which recorded lowest percentage of DH (1.16%), WE (0.52%) and highest grain yield of 47.45 q/ha. This was followed by the treatment with application of cartap hydrochoride 4 GR @ 25 kg/ha after 25 days after transplanting+spray of cartap hydrochoride 50 SP @ 400 g/acre at booting stage. All the tested insecticides were found very effective against yellow stem borer (YSB). In case of farmers’ practice, the lowest grain yield was recorded i. e. 30.80 q/ha. Over the season the cost: benefit ratio was maximum (1: 2.57) in the treatment (Application of cartap hydrochoride 4 GR @ 25 kg/ha after 25 days after transplanting+spray of cartap hydrochoride 50 SP @ 400 g/acre at booting stage) followed by application of pheromone trap @ 25 kg/ha at tillering stage after 25 days of transplanting.