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 1st WAS i.e., 13th SMW (16.67%) during summer, 2017. Thereafter the infestation increased gradually and its highest infestation was observed on 7th May 2017 i.e., 19th 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 1st WAS i.e., 13th SMW (15.00%) then infestation increased gradually and its peak incidence was observed on 5th May 2021 i.e., 18th 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.