Effect of Meteorological Parameters on Population Dynamics of Sucking Pest and its Natural Enemy in Brinjal

To assess the effect of meteorological parameters on seasonal population dynamics of whitefly, jassid and LBB on brinjal, experiments were conducted at College of Agriculture, Ganjbasoda during winter season (2016-2018) and rainy season (2018-2020) with NS302 variety. The activity of these insects were initiated in 44^th standard meteorological week (SMW) with 30.16, 19.12 and 3.40 individuals / plant and peak population of whitefly with 37.84 individuals / plant on 12^th SMW, jassid found maximum with 25.36 individuals / plant with 11^th SMW however population of LBB get maximum (5.14 / plant) in 10^th SMW respectively and remained active up to 13^rd SMW during winter season although seasonal activity of these insects were commencement from 27^th SMW with 2.5, 1.29 and 3.40 individuals / plant and reached at maximum with 36.17 and 5.78 of whitefly as well as LBB on 42^nd SMW whereas population of jassid was found higher (14.99) in 41^st SWM and its ended up to 46^th SMW during rainy season. The correlation coefficient between whitefly, jassid and LBB with population and meteorological parameters maximum temperature (r=0.786*,r=0.782*,r=0.4738) minimum temperature (r=0.85*,r=viz. 0.852*, r=0.528*), wind speed (r=0.691*,r=0.451*) and BSS (r=0.801*,r=0.801*,r=0.433*) were strongly significant positive impact except wind speed in case of jassid whereas significant negative correlation with relative humidity (RH) in white fly and jassid (r=-0.512*, r=-0.509*). The Correlation analysis between whitefly, jassid and LBB population and weather parameters revealed that significant positive correlation with maximum temperature(r=0.569*, r=0.540) except jassid (r=0.256) and significant negative correlation with minimum temperature(r=-0.831*) only white fly however rainfall(r=-0.643*r=-0.569*) and BSS (r=-0.656*, r=-0.479*) excluding jassid.