Bioefficacy of Azadirachta indica and Nerium oleander on Spodoptera litura

Among the different concentrations of Azadirachta indica and Nerium oleander leaf extracts tested against Spodoptera litura, the highest larval mortality of 77.77 and 66.66% resulted at 6% concentration followed by 55.55 and 44.44% mortality at 5%, respectively. The lowest pupation of 33.33 and 22.22% were observed at 6% and the highest pupal mortality of 100 and 66.67% were recorded at 6%, respectively. Lowest adult emergences of 50 and 33.33% were recorded at 5% concentration. Highest adult malformation of 100% was recorded at both the extracts at 5%. The highest concentration of 6% of the both the extracts increased the mortality of larva and decreased the survival percentage of Spodoptera lituras.