Vol. 11, Issue 5 (2022)

Author(s):
Bommi Appalanaidu and Ashwani Kumar

Abstract:
The experiment was conducted at the research plot of the Department of Agricultural Entomology at Central Research Field, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj during the Kharif season of 2021 “Comparative efficacy of selected chemicals and biopesticides against fall army worm [Spodoptera frugiperda (J. E. Smith)] on maize (Zea mays L.) at Prayagaj (U.P)” seven treatments were evaluated against, Spodoptera frugiperda i.e.,.T1Chlorantraniliprole 9.3% +Lamda-Cylothrin 4.6% ZC, T2 Chlorantraniliprole 18.5% SC, T3 Beauveria Bassiana 1.5% LF, T4Emamectin benzoate 5%SG, T5 Neem oil, T6 Spinetoram 11.7% SC, T7 Thiamethoxam 12.6%+ lambda cyhalothrin 9.5%, T0 Control, Were tested to the Evaluation against Spodoptera frugiperda and their influences on yield of Maize. Each insecticide was sprayed twice at 15 days interval. The leaves and cob infestation per plant was taken day before and 3, 7, and 14 days after each spray. All the insecticides tested significally reduced the pest infestation compared to control. The lowest larval reduction of fall army worm against control was observed in spinetoram 11.7%. The mean crop yield ranged between 23.41q/ha to 36.79q/ha, the highest being. T6 spinetoram 11.7% (36.79q/ha) followed by T2 Chlorantraniliprole 18.5% SC (36.34 q/ha). When cost benefit ratio worked out, interesting result was achieved, among the treatment studied, the best and most economical treatment T6 Spinetoram 11.7% SC (1:2.63) fallowed by the T2 Chlorantraniliprole 18.5%SC (1:2.61).