Efficacy of neem (Azadirachta indica) and acacia (Acacia auriculiformis) extract was assessed on the basis of toxicity and repellency effects by red flour beetle. The study followed a completely randomized design with three replications. Plant extracts concentrations were 5%, 7.5%, and 10% and control (only solvent treated). The results revealed that neem leaf extract, particularly at 10%, exhibited the highest efficacy, showing 53.94% adult mortality and 49.99% repellency against red flour beetle. In contrast, 5% of the acacia leaf extract demonstrated the lowest mortality (23.09%) and repellency (26.53%). The effectiveness of both extracts increased with higher concentrations, neem showing superior activity compared to acacia. These findings suggest that neem leaf extract, especially at higher concentrations, could serve as a promising, eco-friendly alternative for controlling red flour beetle infestations in stored grains.

Keywords: Efficacy of neem extract; Acacia extract; Red flour beetle.