Abstract
Three plant species, bishkatali, Polygonum hydropiper Linn.; Nishinda, Vitex negundo Linn., and pithraj, Aphanamixis polystachya locally grown in Bangladesh were evaluated for their repellent and feeding deterrent activity against adult red flour beetle, Tribolium casteneum (Herbst). All the plant extracts were found to be effective repellents and having feeding deterrent action against the beetle. It was observed that bishkatali leaf extracts have strong repellent and feeding deterrent effect followed by nishinda and pithraj. The results also indicated that the water extract was more effectivethan acetone extract. The red flour beetle was more sensitive to the repellent than that of antifeedant action. Key words: feeding deterrent, repellent, Tribolium casteneum
