Population dynamics of stem fly, Melanagromyza sojae (Zehntner) infesting black gram (Vigna mungo L.) in summer season

Abstract

The infestation of Melanagromyza sojae infesting black gram started from 1 st WAS i.e., 13 th SMW (16.67%) during summer, 2017. Thereafter the infestation increased gradually and its highest infestation was observed on 7 th May 2017 i.e., 19 th SMW (78.33%). Minimum temperature (MinT) and morning vapour pressure (MoVP) showed highly significant positive association with infestation (0.509** and 0.522**, respectively). Evening vapour pressure (EvVP) exhibited significant positive association (0.440*). During summer 2021, infestation initiated from 1 st WAS i.e., 13 th SMW (15.00%) then infestation increased gradually and its peak incidence was observed on 5 th May 2021 i.e., 18 th SMW (80.00%). Minimum temperature (r = 0.769**) and evening vapour pressure (r = 0.510**) exhibited highly significant positive association, while morning vapour pressure (0.495*) showed significant positive association.