Efficacy of Newer Insecticides against Fall Armyworm, Spodoptera frugiperda on Maize

The effectiveness of various newer insecticides against fall armyworm was assessed. The different treatments were spray viz., flubendiamide 39.35 % SC, chlorantraniliprole 18.5% SC, emamectin benzoate 5% SG, Beauveria bassiana, Metarhizium anisopliae, neem seed kernel extract, Bacillus thuringiensis and control. The overall mean of the two sprays revealed that the most effective treatment was chlorantraniliprole 18.5% SC recorded the lowest larval population followed by emamectin benzoate 5% SG, Flubendiamide 39.35 % SC, Bacillus thuringiensis, Beauveria bassiana, Metarhizium anisopliae, neem seed kernel extract. During the yield observation, it was observed that a significantly higher yield was obtained in chlorantraniliprole 18.5% SC treated plots which is followed by emamectin benzoate 5% SG, flubendiamide 39.35 % SC, Bacillus thuringiensis, Beauveria bassiana, Metarhizium anisopliae and NSKE 5 %. Maximum percentage increase in yield over control was obtained from chlorantraniliprole 18.5% SC treated plots which are followed by emamectin benzoate 5% SG, flubendiamide 39.35 % SC, Bacillus thuringiensis, Beauveria bassiana, Metarhizium anisopliae and NSKE 5 %. The economics of various treatments based on net profit and cost of plant protection revealed that the highest cost: benefit ratio was observed in plot treated with emamectin benzoate 5% SG followed by Beauveria bassiana, chlorantraniliprole 18.5% SC, Bacillus thuringiensis, NSKE, Metarhizium anisopliae, flubendiamide 39.35 % SC.