International Journal of Entomology Research

Authors
Syed Imran, Doddabasappa B, Mutthuraju GP, Sudarshan GK, Sahida A, Chakravarthy AK

Abstract
Studies were made to know the relationship of DBM moth catches in pheromone traps, its infestation and its relationship with weather parameters. The results showed the significant negative relationship (r= -0.989) between DBM moth catches in trap and larvae on plants, and inversely proportional to the number of pupae on cabbage plants. The seasonal incidence of DBM moth catches under field conditions was found in relation to the prevailing weather conditions during the study period. The moth catches in traps gradually increased from 10.38 moths / trap / week at 23^rd standard week to maximum of 171.54 moths / trap / week during 27^th standard week. The trap catches of DBM moths had a positive association with maximum temperature (r=0.650) and rainfall (r=0.852) and negative association with minimum temperature (r= -0.696), morning RH (r= -0.434), afternoon RH (r= -0.821), evaporation (r= -0.183) and wind speed (r= -0.825). This suggests that combination of all the factors influenced DBM moth catches. Similar results were also obtained with DBM pupae in study plot.