Management of Mungbean Yellow Mosaic Virus (MYMV) Disease using Chemical Insecticides and Bio-pesticides

Abstract

Field trials were conducted during 2018-19 and 2019-20 crop seasons to evaluate the efficacy of insecticides and bio-pesticides for the management of Mungbean Yellow Mosaic Virus (MYMV) disease, which is naturally spread by vector whitefly (Bemisia tabaci). The mean of two-year data showed that the, lowest disease incidence and the least number of whiteflies were recorded in Imidacloprid (17.8% SL) treated plots. Fifteen days after the 1st spray and 2nd spray of the Imidacloprid (17.8% SL), recorded 17.09% & 18.15% disease incidence, respectively, as compared to control 47.45%. As well as imidacloprid treated plot documented the least number of whiteflies 3.10/plant five days after 1st spray and 3.32/plant five days after 2nd spray as compared to control 7.57 and 7.60 respectively.  It also offers maximum reduction of whiteflies 61.75% which consequently resulted in higher grain yield (9.10 q/ha). In bio-pesticides, Beauveria bassiana @ 0.5% and Neem Oil @ 3ml/lit, were found to be moderately effective in managing the disease incidence and the population of whiteflies, 22.82 and 25.11 per cent disease incidence recorded at 15 days after first spray and 25.32 and 26.73 per cent at 15 days after second spray.