Repellency of camelthorn (Alhagi camelorum F.) and nettle (Urtica dioica L.) extracts against Tribolium castaneum (Coleoptera: Tenebrionidae)

The insert repellency of camelthorn (Alhagi camelirum F.) and nettle (Urtica dioica L.) extracts was investigated against red flour beetle (Tribolium castaneum) adults. The plants They were dried in room temperature and soaked in 98% ethanol, then concentrated by use of evaporation apparatus. Extract concentrations of 5, 10, 30 and 50% were prepared with pure acetone. Experiments were carried out according to filter paper method. Repellency percentage of each extract was recorded after one, three, five and ten hours of exposure at four replicates. The results showed that, repellency of both extracts increased significantly as concentrations rate and time of intervals increased. The highest repellency (76.6%) achieved 10h after exposure for camethorn and the least (3.33%) was obtained after one hour of treatment for nettle. Also, the repellency of camelthorn was more than nettle in all concentrations. According to results of this study, the camelthorn has a good potential to use as repellant for control of stored product pests.