author(s)
RB Dake and VK Bhamare

abstract
An investigation was undertaken to study the bio-efficacy, persistence and residual toxicity of different newer insecticides against whitefly on sunflower at research farm of department of Agril. Entomology College of agriculture Latur. The observations on total number of whiteflies were recorded on top, middle and bottom leaves of five randomly selected plants from each treatment at one day before and 1, 3, 7 and 14 days after first and second application of insecticides. All insecticide treatments were found significantly superior over untreated control in minimizing the incidence of whiteflies. On 14^th DAS, the population of whiteflies was ranged 0.64 to 1.43 whiteflies/leaf and 0.87 to 1.42 whiteflies/leaf after first and second spray respectively. Imidacloprid 0.003 per cent exhibited significantly lowest population of whitefly (0.64 and 0.87 per leaf). However, spinosad 0.007 per cent (1.02 and 1.07 whiteflies per leaf), indoxacarb 0.005 per cent (1.07 and 1.10 whiteflies per leaf) and chlorantraniliprole 0.005 per cent (1.20 and 1.30 whiteflies per leaf) were found to be next effective treatments and statistically on par with each other. Fenpropathrin 0.01 per cent (1.31 and 1.42 whiteflies per leaf), emamectin benzoate 0.002 per cent (1.36 and 1.29 whiteflies per leaf) and flubendiamide 0.007 per cent (1.43 and 1.20 whiteflies per leaf) were found to be subsequently effective treatments at 14 days after first and second spray, respectively. Among different insecticides, imidacloprid, spinosad and indoxacarb exhibited highest efficacy against sunflower whiteflies.