Abstract
Xylella fastidiosa (XF) is known for its ability to infect and cause disease in numerous plant species. The most recent host species of this bacterium is olive trees (Olea europea) with reports in southern Italy, where plants with leaf blight had the symptoms associated with infection by X. fastidiosa subsp. pauca (XFp). Reports of the presence of (XF) in olive trees were made in Californ…