Vol. 10, Special Issue 5 (2021)

Author(s):
SD Patil, DV Kusalkar, HM Patil, KD Bhoite, KM Sonawane and SR Pardeshi

Abstract:
A field experiment was conducted to determine the comparative efficacy of some insecticides against brown plant hoppers (BPH) in rice during kharif 2020. The treatments were acephate 75 SP @ 1.50g/L, clothianidin 50 WDG @ 0.05g/L, fipronil 5 SC @ 2.0 ml/L, flonicamid 50 WG @ 0.30g/, imidacloprid 17.8 SL @ 0.20ml/L, thiamethoxam 25 WG @ 0.20g/L, quinalphos 25EC @ 2.0ml/L and untreated control. Fipronil 5 SC @ 2.0 ml/L found to the most effective treatment for the control of BPH by recording the highest percent reduction of 85.45% over untreated control among all the treatments and it was follwed clothianidin 50 WDG @ 0.05g/L (85.09), thiamethoxam 25 WG @ 0.20g/L (84.53) acephate 75 SP @ 1.50g/L (84.31), imidacloprid 17.8 SL @ 0.20ml/L (84.17) and flonicamid 50 WG @ 0.30g/L (83.21). The untreated control recorded maximum of 36.23, 39.27 and 41.20 number of BPH/hill at 3, 7 and 14 days after second spray. The grain yield differnce due to various insecticidal treatments were significant. The treatment with fipronil 5 SC @ 2.0 ml/L recorded highest yield of 55.43 q/ha. However, it was at par with clothianidin 50 WDG @ 0.05g/L (53.97), imidacloprid 17.8 SL @ 0.20ml/L (53.61), thiamethoxam 25 WG @ 0.20g/L (53.30), flonicamid 50 WG @ 0.30g/L (53.24) and acephate 75 SP @ 1.50g/L (51.42). The lowest of 37.35 q/ha grain yield was recorded in untreated control. The highest 97.40 percent increase in yield over control was recorded in treatment with fipronil 5 SC @ 2.0 ml/L. It was followed by clothianidin 50 WDG @ 0.05g/L (92.20), imidacloprid 17.8 SL @ 0.20ml/L (90.91), thiamethoxam 25 WG @ 0.20g/L (89.81), flonicamid 50 WG @ 0.30g/L (89.60) and acephate 75 SP @ 1.50g/L (83.12).