ABSTRACT Present study was conducted at Bariyatu in the Ranchi district during the year 2011 to 2013. Heteroceran Lepidoptera is one of the largest order of agricultural and agro-forestry pests. Thus, it shows impact on the economy. Agylla remelana, Moore belongs to family Noctuidae was collected by light net traps between 17:00 hrs to 21:00 hrs fortnightly in the study area. Identification was accomplished by different keys. Total 142 individuals of Agylla remelana, Moore were recorded during the study period from the three sites at study area. Diversity index was calculated by Shannon-Weiner method. While statistical correlation with ecological factors (Mean temperature, relative humidity, wind speed, sunlight and rain) was computed by the help of SPSS software. Agylla remelana, Moore (Lepidoptera: Noctuidae) was the most common noctuid moths at study area. Correlation with mean temperature, rain, relative humidity, wind speed and sunlight was positive. The correlation with rain was very significant with the species richness of the moth. Although anthropogenic disturbances were causing the habitat loss in the study area and therefore impact on the species richness of Agylla remelana, Moore was observed