Repellent potential of Azadirachta indica A. Juss. and Glycyrrhiza glabra L. against cowpea bruchid, Callosobruchus chinensis L. (Coleoptera: Bruchidae)

Keeping in view the bio-friendly nature of plant extracts, experiments were designed to determine the toxicological and repellent effects of Azadirachta indica and Glycyrrhiza glabra against the insect pest of stored beans, Callosobruchus chinensis (Coleoptera: Bruchidae). For determination of repellent action, area preference method was adopted. In the method of area preference, half of filter paper was treated with serial concentrations of plant extracts. After the release of beetles and their response against the plant extracts, results highlighted potential of crude extracts towards creating a repellent zone for the storage beetle. After the experiments, it was found that the A. indica was more potent as compared to the G. glabra.