For the first time in San Luis Obispo County, an Asian citrus psyllid has been found in a commercial orange crop.  Psyllids have been discovered four times prior, but all have been at residences.  The invasive pest was found by county agriculture officials near the border of Santa Barbara County. State officials are working with county officials to institute high-density trapping to check if other pysllids are present.  A quarantine is being established around the orchard to prevent infestation in other areas.