Evaluation of Novel Insecticides and Bio-Pesticides against Helicoverpa armigera and Spodoptera frugiperda in Maize

Abstract

The field experiment was conducted to study the comparative performance of various insecticides and biopesticides against Helicoverpa armigera and Spodoptera frugiperda. Chlorantraniliprole 18.5SC @ 0.4ml/l showed the most effective control on H. armigera and S. frugiperda, with pooled mean larval population of 0.42 and 1.16 larvae/plant followed by emamectin benzoate 5 SG @ 0.4g/l (0.52 and 1.24 larvae/plant), spinaosad 45 SC @0.3 ml/l (0.62 and 1.32 larvae/plant), indoxacarb 14.5 SC@ 1ml/l (0.73 and 1.42 larvae/plant) and novaluron 10 EC @0.1ml/l (0.83 and 1.52 larvae/plant). The least effective treatment was agniastra @1000ml / 50 l (1.19 and 1.81 larvae/plant) after control (2.08 and 2.82 larvae/plant) followed by nimbicidine 0.03 EC @5ml/l (1.03 and 1.75 larvae/plant) and Bacillus thuringenesis @ 2g/l (0.92 and 1.62 larvae/plant). The results concluded that chlorantraniliprole, emamectin benzoate, indoxacarb and novaluron consistently demonstrated a significant reduction in larval population and the longest residual. Whereas, Bt and nimbicidine provided moderate control and the shortest residual capacity, which is favorable to the environment.