Vol. 11, Special Issue 10 (2022)

Author(s):
SD Mohapatra, Swoyam Singh and GS Giri

Abstract:
A field trial was conducted at experimental farm of ICAR-NRRI, Cuttack during kharif 2019 and rabi 2020 to evaluate the bio-efficacy of triflumezopyrim 5% + spinetoram 9% (14% SC) against yellow stem borer and brown plant hopper in rice and their effect on natural enemies. The experiment was comprising of seven treatments viz., T₁ Triflumezopyrim 5% + spinetoram 9% (14% SC), T₂ Triflumezopyrim 5% + spinetoram 9% (14% SC) T₃ Triflumezopyrim 5% + spinetoram 9% (14% SC) T₄ Triflumezopyrim 10.6% SC T₅ Spinetoram 12% SC T₆ Fipronil 5% SC T₇ Untreated Control. The Lowest BPH population was recorded in triflumezopyrim 5% + spinetoram 9% (14% SC) @ 84 g ai/ha which are statistically at par with triflumezopyrim 5% + spinetoram 9% (14% SC) @ 70 g ai/ha throughout the observation. Similarly, lowest white ear head (WEH) was recorded in triflumezopyrim 5% + spinetoram 9% (14% SC) @ 84 g ai/ha. Triflumezopyrim 5% + spinetoram 9% (14% SC) @ 70 g a.i/ha provided effective control of yellow stem borer and brown plant hopper. Further, triflumezopyrim 5% + spinetoram 9% (14% SC) was found to be safe to the predatory mirid bug, Cyrtorhinus lividipennis and spider, Pardosa pseudoannulata in rice ecosystem.