Population dynamics of major sucking insect pests of mungbean [Vigna radiata (L.) Wilczek] in relation to weather parameters

Abstract

An investigation was conducted to find out the population dynamics of sucking insect pest of mungbean in relation to weather parameters during Kharif season 2018. The first occurrence of adult whitefly and jassids on mungbean was recorded during 31st SMW. The pest population of whitefly and jassids was ranged from 4.20-14.10 and 1.20-6.30 cage / plant, respectively during the cropping period. The whitefly population was reached at its first peak (10.90 whiteflies /cage/plant) at 32nd SMW. Thereafter, whitefly population was started gradually decline and again attained second peak (14.10 whiteflies /cage/plant) at 39th SMW. Correlation studies revealed that maximum temperature and sunshine hours had exhibited significantly positive correlation (r= 0.60 and r= 0.69, respectively) with whitefly population. Further, evaporation was positive while, minimum temperature, morning RH and evening RH, wind speed and rainfall were expressed non-significant negative correlation. The jassids population was gradually increased and reached at its peak (6.30 jassids /cage/plant) during 36th SMW. Significant negative correlation was exhibited between evaporation and jassids population whereas, morning RH, evening RH, wind speed and rainfall had non-significant positive correlation.