Bio-efficacy and phytotoxicity of cartap hydrochloride 50% + buprofezin 10% WP against yellow stem borer of rice

Abstract

Field experiment were conducted in the Instructional Cum Research (ICR) farm, Assam Agricultural University, Jorhat during rabi and kharif seasons (2015) to evaluate the bio-efficacy and phytotoxicity of cartap hydrochloride 50% + Buprofezin 10% against yellow rice stem borer, Scirpophaga incertulas Walker (Lepidoptera: Pyralidae). Ten treatments of chemicals at different doses and untreated control (Water Spray) were laid out in randomized block design with three replications. The results showed that cartap hydrochloride 50% + buprofezin 10% @ 480 g/ha significantly reduced the infestation of dead heart (2.87% and 2.98%), white earhead (1.97% and 1.51%) with maximum grain yield (6250 kg/ha and 4900 kg/ha) in both the seasons at 15 days after treatment, respectively in compared to the standard checks viz. chlorpyriphos 20% EC @ 250 g a.i./ha and Lambda cyalothrin 5% EC.