This map shows the current boundaries of the HLB quarantine in portions of Southern California as of Sept. 25, including the newest area of grid 472. Valley News/Courtesy image
RIVERSIDE COUNTY – Riverside County has expanded the boundary of a quarantine for Huanglongbing (HLB), a citrus disease spread by the Asian Citrus Psyllid. A quarantine zone is typically established around the infected location to restrict movement of citrus plants, clippings, and related plant material to prevent further spread.In Riverside County, that means that residents and citrus growers in affected zones must abide by rules on purchase, sale, and movement of citrus plants or parts.Effective September 25, 2025, the Department is expanding the HLB quara
