Laboratory evaluation were conducted on seeds of the tooth pick plant (Ammi visnaga L) extracted by organic solvents of different polarities and tested for their toxic effect on Rhizopertha dominica infesting wheat grains. Toxicity of chloroform extract was the most potent, at both Lcso LC95 levels (i.e.534 and 874 ppm). Reproductive potential of treated insects were strangly affected as no progeny were obtained when treated with either LC50 or LC95 with A. visnaga. Extracts treatment at LC95 level organic extract gave protection up to 5 weeks for petroleum ether and chloroform and 4 weeks when acetone was used for extraction. All tested extracts reduce grain germination at the end of 14 weeks storage period. Also, treated wheat grains with tooth pick extracts reduced the weight loss of grains.