Author(s): A. K. Nayak, A. Sarkar and S. K. Das

Abstract: A two-year field study was conducted during Rabi season of 2016-17 and 2017-18 to investigate the seasonal incidence and management of epilachna beetles infesting potato. During the entire crop growth period, different meteorological data were observed and recorded. Various insecticides viz. Chlorantraniliprole 18.5% SC, Indoxacarb 14.5% SC, Novaluron 10% EC, Imidacloprid 17.8% SL, Spinosad 2.5% SC, Flonicamid 50% WG and Spinetoram 11.7% SC were evaluated for best pesticidal management. First appearance of this beetle was observed during the 52 standard meterological week (last week of December) in both the years and the beetle was active till the maturity of the crop. Thereafter, the density of beetle increased steadily and reached to a peak in 7th SMW in 2017 and 8thSMW in 2018 (February month) and then decreased. Among the various environmental factors, the population of epilachna beetle was positively correlated with maximum and average temperature and a negative correlation was found with relative humidity. The efficacy of Chlorantraniliprole 18.5% SC@30gm a.i.ha^-1 (72-76%) was highest followed by Indoxacarb 14.5% SC@60gm a.i.ha^-1 (62-71%)

DOI: 10.22271/09746315.2022.v18.i1.1545

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