A field study was conducted at Dharwad, India, during 2016 - kharifseason, to determine the population dynamics of Marucavitrata(Gayer), on groundnut. The infestation of M. vitratacommenced from 32nd meteorological standard week (MSW) (whencrop was 4 weeks old), attained peak of 15.90 larvae per meter rowat 35thMSW(when crop was 7 weeks old), and decreased gradually toreach nil during 39thMSW of 2016 (when crop was 11 weeks old)during the year 2016. The pest population such as larval counts andtheir webs per meter row, per cent leaf damage exhibited positivecorrelation with maximum temperature. However, the same parametersexhibited negative and non-significant correlation with othermeteorological observations such as minimum temperature, bothmorning and evening relative humidity and wind velocity.