Antifeedant Activity of Azadirachta indica against Spodoptera frugiperda (J. E. Smith)

In the dual choice test, feeding deterrence was recorded in the second instar larval stage of when treated Spodoptera frugiperda with the sub-lethal concentrations (LC and LC ) of the neem-based formulations i.e., commercial neem formulation (0.15%), neem oil and 30 50 neem seed kernel extract (NSKE).).The highest antifeedant activity was in NSKE (43.53 and 72.06 per cent) in comparison to the commercial neem formulation (27.37 and 58.97 per cent) and neem oil (17.51 and 50.59 per cent).The relative consumption index (RCI) was also high in case NSKE (0.808) followed by commercial neem formulations and neem oil.The higher antifeedant activity and RCI indicates high level of feeding deterrent.