Officials are asking everyone to help stop the spread of a plant disease fatal to citrus trees. State and county officials declared a citrus quarantine last year, which includes parts of northern Carlsbad, after the disease was found on a property in Oceanside.

• The Carlsbad quarantine area has been expanded since the county’s initial announcement. It’s now generally north of Tamarack Avenue, from the coast to the city’s northeast border with Oceanside, though in some areas it dips south of Tamarack, to Glasgow Drive and Lancaster Road, east of El Camino Real. This includes parts of Robertson Ranch and most of Calavera Hills.
• Don’t share homegrown citrus inside or outside the quarantine area.
• The disease, called huanlongbing or HLB, isn’t harmful to humans or animals, but once a tree is infected, it can’t be saved and needs to be removed right away.
• Check your trees for signs of HLB. Signs include blotchy, yellow leaves that look different on the front and back and fruit that is small and/or lopsided and tastes rancid.
• The disease is spread by adult Asian citrus psyllids who are infected with a specific type of bacteria.
• If you see any signs, report it to the CDFA pest hotline at 800-491-1899.

Learn more about Asian citrus psyllids in San Diego County, as well as the local quarantine area, on the county’s website.