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 biopesticides 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).