Evaluation of Bio-pesticides and Insecticides Against Brinjal Shoot and Fruit Borer (Leucinodes orbonalis Guenee) in Meghalawya of North-Eastern India

Abstract

The field experiments were conducted at ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, India during 2011–2012 to evaluate some bio-pesticides and newly introduced insecticides against shoot and fruit borer of brinjal. The experiments were laid out in Randomized Block Design (RBD) with three replications. The treatments viz., azadirachtin 1 EC (2 ml l^-1), karanjin 2 EC (2 ml l^-1), anonin 1 EC (2 ml l^-1), Bacillus thuringiensis (Bt.) (2 g l^-1), emamectin benzoate 5 SG (0.4 ml l^-1), flubendiamide 480 SC (0.3 ml l^-1), chlorantraniliprole 18.5 SC (0.4 ml l^-1), chlorpyriphos 20 EC (2 ml l^-1) were applied thrice at fifteen days interval starting from initiation of shoot and fruit borer infestation. Results showed that chlorantraniliprole (2.46%) was the best treatment in reducing the shoot infestation (81.88% reduction) which was statistically at par with flubendiamide (3.08%) and emamectin benzoate (3.76%) with 77.37% and 71.95% reduction over untreated control, respectively. The overall mean fruit infestation were also minimum in chlorantraniliprole (5.76%) and flubendiamide (5.93%) treated plots with 79.45% and 78.84% reduction over untreated control plots (28.03%), respectively. Pooled data of two years experimental results indicated that highest marketable yield was recorded in chlorantraniliprole treated plots (155.01 q ha^-1) followed by flubendiamide (149.50 q ha^-1), emamectin benzoate (134.24 q ha^-1) and chlorpyriphos (125.43 q ha^-1). Among bio-pesticides, highest mean marketable yield was recorded in Bacillus thuringiensis treated plots (114.45 q ha^-1) followed by azadirachtin (101.11 q ha^-1).