Vol. 12, Special Issue 7 (2023)

The present investigation on the effectiveness of different insecticides against the brown planthopper, Nilaparvata lugens (Stal.), on rice in field conditions demonstrated that pymetrozine 50% WG @ 150 g a.i./ha was found to be the most efficient chemical, recording the highest overall percent decline in BPH population, i.e., 76.88 percent and 79.86 percent after both the initial and second sprays, accordingly. Pymetrozine was succeeded by sulfoxaflor 24% SC @ 175 ml a.i./ha, which recorded 75.10 percent and 74.49 percent reduction. Pymetrozine 50% WG, with 2.21 BPH/hill after first spray and BPH/hill after second spray, had the lowest overall mean population of BPH, followed by sulfoxaflor 24% SC, with 2.38 BPH/hill after first spray and 2.28 BPH/hill after second spray. All the treatments reported safer to the population of spiders and coccinellids among them pymetrozine 50% WG recorded higher mean population of spiders 2.44 and coccinellids 1.08 per hill in comparison with untreated plot.