Comparative efficacy of some indigenous plant materials as repellent against pulse beetle, Callosobruchus chinensis (L.)

Abstract

A laboratory experiment was carried out in the Department of Entomology, School of Agricultural Sciences and Rural Development, Nagaland University, Medziphema, Nagaland, to study the repellent effect of some indigenous plant materials against Callosobruchus chinensis (L.). The plant materials were leaves of Jatropha curcas L., seeds of Litsea citrata and Piper nigrum. Plant extracts were prepared with two different solvent, acetone and distilled water at five different doses of 10, 25, 50, 75 and 100 mg/ml. The repellent effect, test was carried out by half disc of filter paper method with a pipette at different doses of each plant extracts. The repellent effect was recorded after 1, 2, 3, 4 and 5 hours of the treatment application. In acetone extracts of plant material, the highest repellent effect was observed in Litsea citrata @ 100 mg/ml (86.67%) followed by Piper nigrum (80%) and Jatropha curcas L. (73.33%). In distilled water extract, the highest repellent effect was observed in Litsea citrata @ 100 mg/ml (86.67%) followed by Piper nigrum (83.33%) and Jatropha curcas L. (73.33%). The finding showed the strong repellent effect of Litsea citrata extract against pulse beetle. All the plant materials with water extract was comparatively more effective than acetone extract.