Corrected percent mortality (mean ± S.E.; N = 6) of 3rd instar larvae of Spodoptera litura bioassayed against different biorational synthetic, botanical and microbial insecticides alone and in binary combinations. I1= flubendiamide, I2= spinetoram, B1= Azadirachta indica oil, B2= Nicotiana tabacum oil, M1= Bacillus thuringensis kurstaki, M2= Spodoptera litura–NPV. Alphabets at bar tops indicate significant difference among the treatments (one-way factorial ANOVA followed by Tukey’s post-hoc test HSD at α= 0.05).