Population dynamics of Jassid on mungbean (Vigna radiata (L.) Wilczek) throughout the summer of 2018

Abstract

The investigation was conducted at the Research Farm of Birsa Agricultural University in Kanke, Ranchi during the summer of 2018. The population of jassids began in the 5th week after sowing, specifically during the 16th standard meteorological week of April 2018. It increased steadily each week, peaking at the 10th week after sowing with 3.0 jassids per cage. This peak coincided with maximum temperatures (39.0 °C), minimum temperatures (22.7 °C), maximum relative humidity (85.6%), minimum relative humidity (45.0%), and rainfall (4.3mm). Subsequently, the Jassid population gradually declined and became negligible by the time of harvest. Correlation coefficient analysis indicated a positive and significant correlation with maximum and minimum temperatures, while relative humidity and rainfall did not show significant correlations.