Percent reduction (mean ± S.E.; N = 4, n = 40) in Spodoptera litura larval numbers on the potato plants recorded at different time intervals post-treatment by different biorational synthetic, botanical and microbial insecticides alone and in binary combinations in winter 2020. I1 = flubendiamide, I2 = spinetoram, B1 = Azadirachta indica oil, B2 = Nicotiana tabacum oil, M1 = Bacillus thuringensis kurstaki, M2 = Spodoptera litura–NPV. Small and capital alphabets indicate significant difference among the treatments for each DAT and overall among the treatments, respectively (factorial ANOVA followed by Tukey’s post-hoc test HSD at α= 0.05).