Efficacy of newer molecules of insecticides against brinjal shoot and fruit borer, Leucinodes orbonalis Guenee (Lepidoptera: Crambidae) and fruit yield

Abstract

Six insecticides, viz., Rynaxypyr 18.5%SC, Spinosad 45%SC, Indoxacarb 15.8%EC, Abamectin 1.9%EC, Emamectin benzoate 5%SG and Flubendiamide 20%WDG were evaluated in the field against brinjal fruit and shoot borer Leucinodes orbonalis Guen. during Rabi and summer of 2012-13, Kharif and Rabi of 2013-14 at the Central Research Station farm, Orissa University of Agriculture and Technology (OUAT) Bhubaneswar with brinjal variety cv.“ Utkal Anushree”. Four foliar spray applications of the chemicals were given at 15, 30, 45, 60, 75 and 90 days after transplanting (DAT). Observations were taken on the incidence of shoot and fruit borer at 7 and 14 days after spraying. Altogether six sprays were given. Observation of shoot damage was taken at 15, 30, 45 and 60 (DAT) and fruit damage was taken at 45, 60, 75 and 90 DAT. Lowest shoot and fruit infestation and highest fruit yield were obtained in plots treated with Flubendiamide and Rynaxypyr followed by Emamectin benzoate. Maximum benefit-cost ratio was obtained with Flubendiamide 20%WDG in both the years.