The olive fruit fly is a rather new pest of olives in California. Mating disruption is a technique that has not been tested in the US for this species. The sex pheromone the female releases has been isolated and synthesized. Field trials were run with pheromone and yeast traps and although flies were caught in the yeast traps, a negligible number was found in the pheromone traps during spring and early summer in California. On June 16th, 2007, one trap with synthetic pheromone and one trap with 25 virgin females were hung on olive trees for 48 hours. Thirty one males and six females were found in the synthetic pheromone trap and none were found in the virgin female trap. The study of courtship and mating behavior of the olive fruit fly in the lab will increase our knowledge of the sexual activity of the OLF and help us understand the results of our field trials. This may improve mating disruption techniques.