Efficacy and economics of selected insecticides and biopesticides against fall armyworm, Spodoptera frugiperda (J.E. Smith) on maize (Zea mays L.)
Author(s): Diksha Sharma and Ashwani Kumar
Abstract: A field trial was conducted at Naini, Prayagraj during kharif season 2023 at central research farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, Uttar Pradesh. In Randomized Block Design with eight treatments replicated thrice times were evaluated against Spodoptera frugiperda i.e. Chlorantraniliprole 18.5% EC, Spinetoram 11.7% SC, Lambda cyhalothrin @ 2.5% EC, Azadirachtin (Neem oil @ 5%), Beauveria bassiana 5% WP, Bacillus thuringiensis 4%WSP, Emamectine benzoate @ 5% SG and Control. Result revealed that, among the different treatments lowest larval population of maize fall armyworm was recorded in Spinetoram @ 11.7% SC (1.19). Chlorantraniliprole @ 18.5% SC (1.49) was found to be the next best treatment followed by Emamectin benzoate @ 5% SG (1.75), Lambda cyhalothrin @ 2.5% EC (1.98), Azadirachtin (Neem oil @ 5%) (2.19). The least effective treatments were Beauveria bassiana 5% WP (2.39) whereas Bacillus thuringiensis (2.61) was found to be least effective against this pest. The plot treated with Spinetoram 11.7% SC show highest yield (45.10 q/ha) followed by Chlorantraniliprole 18.5% EC (40.34 q/ha), Emamectine benzoate @ 5% SG (36.82 q/ha), Lambda cyhalothrin @ 2.5% EC (33 q/ha), Azadirachtin (Neem oil @ 5%) (28.18 q/ha), Beauveria bassiana 5% WP (27 q/ha), Bacillus thuringiensis 4% WSP (23.12 q/ha) as compare to control plot (20.26 q/ha). Among the treatments the best and most economical treatment was Spinetoram 11.7% SC (1:2.58) followed by Chlorantraniliprole 18.5% EC (1:2.29), Emamectine benzoate @ 5% SG (1:2.23), Lambda cyhalothrin @ 2.5% EC (1:1.99), Azadirachtin (Neem oil @ 5%) (1:67), Beauveria bassiana 5% WP (1:1.50), Bacillus thuringiensis 4% WSP (1:1.39) as compare to control plot (1:1.28).
