The United States Department of Agriculture (USDA) Animal & Plant Health Inspection Services has drawn a Mediterranean fruit fly quarantine zone around an area that includes the Cal Poly Pomona campus. As a result, the university cannot harvest or sell certain fruits until March 1. The quarantine zone was established on Dec. 16 after two fertile Mediterranean fruit flies, commonly called Medfly, were discovered in downtown Pomona. Medfly is one of the worlds most destructive agricultural pests, often attacking ripening fruit leaving it unfit to eat.