author(s)
S Dash, LN Mohapatra, S Swain and DK Swain

abstract
A field experiment on bio-efficacy of new insecticides in combination with neem products against plant hoppers of rice was conducted during kharif 2017 at Central Research Farm, Department of Entomology, Orissa University of Agriculture and Technology (OUAT), Bhubaneswar. Insects recorded on rice during the period of study were white-backed plant hopper, Sogatella furcifera (Hovarth), brown plant hopper, Nilaparvata lugens (Stal.). Seven insecticidal treatments viz. flonicamid 50% WG @ 75g a.i./ha, buprofezin 25% SC @ 200 ml a.i/ha, imidacloprid17.8% SL@35gm a.i/ha, flonicamid 50%WG @ 37.5 g a.i./ha + multineem (300ppm) @ 1.25l/ha, buprofezin25%SC @ 100 ml a.i./ha + multineem (300ppm) @ 2.5l/ha, imidacloprid 17.8%SL @ 17.5 ml a.i./ha + multineem (300ppm) @ 1.25l/ha, multineem (300ppm) @ 2.5l/ha were field evaluated against WBPH and BPH. Results revealed that foliar spray of imidacloprid 17.8%SL @ 17.5 ml a.i./ha + multineem (300ppm) @ 1.25l/ha at 55 DAT and 70 DAT was adjudged to be the most effective treatment followed by imidacloprid 17.8% SL@35gm a.i/ha taking into account of its better efficacy on plant hoppers with 87.59 percent reduction in WBPH and 89.65 percent reduction in BPH. Hence imidacloprid (17.8% SL @ 17.5 ml a.i./ha) in combination with neem [multineem (300ppm) @ 1.25l/ha] may be recommended for control of WBPH and BPH in rice.