Eighteen promising long duration pigeonpea genotypes were screened for their reaction against, Exelastis atomosaat Agriculture Research farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during kharif 2013-14 and 2013-14 the first incidence of Plume moth, Exelastis atomosa) was observed in 4th and 5thstandard week in all genotypes. The peak of population of Plume moth, Exelastis atomosa was recorded in 11th standard week ( larvae/plant) in different genotypes. | Population dynamics of Exelastis atomosa Walsingham on pigeonpea genotypes in agro-ecosystem