Since January 2018, the entire county of San Mateo has been under a new round of ACP regional quarantines. The county is now located in the regional Area of Nursery Stock Quarantine Zone 2 and Zone 7 Bulk Citrus Quarantine. The nursery park can be moved from our area to another location in our area (regardless of county lines) or to higher level quarantine areas in California. Production nurseries located in regional quarantine areas 2 or 3 of ACP kindergartens with ACP foster facilities that are offered for national sale or distribution must be operated under a compliance agreement with the California Department of Food and Agriculture. Any ACP (citrus) grocery product listed for sale in the county must be marked with a yellow or blue cdfa citrus day to be sold legally. Citrus fruits from the backyard should not be removed from San Mateo County. Production nurseries are required to process all ACP economic operations available for sale or distribution on a 90-day cycle. ACP COUNTRY reception facilities that are not cultivated and maintained in an APHIS-approved exclusion centre may only be relocated to the regional kindergarten quarantine area within 90 days of the treatment authorization. The approved treatment consists of both a systematized application and an application of sheets with authorized products. Quarantine information, including maps, is available at the California Department of Agriculture and Food. In the San Mateo district, in the fall of 2015 there were two confirmed discoveries of the insect Diaphorina citri, also known as the Asian Citrus Psyllid (ACP).

Asia`s Citrus Psyllid was first discovered in California in 2008 and has spread to the southern part of the state. Insect traps have been used throughout the county to detect other populations and detect the proliferation of the pest. Given the threat to California`s $2 billion citrus industry, it is important that we work together as a community to prevent the spread of the insect. Watch this video to see how you can help. If you think the insect or disease is on your citrus fruit, call our office at (650) 363-4700 or the CDFA parasitic hotline at (800) 491-1899. Video documentation of the first California citrus found to be diagnosed with the deadly Huanglongbing disease was removed from a residence in Southern California in 2012. (1:00:00) Learn more about the threat of Californian citrus fruits from the Asian citrus-psyllide insect, carrying huanglongbing or yellow motor disease, a deadly plant agent. (1:00:00) Image: Jeffrey W. Lotz, Florida Department of Agriculture and Consumer Services, Bugwood.com The Asian citrus psyllid (ACP) is a pest that acts as a vector or vector that spreads huanglongbing (HLB), a devastating citrus disease. This bacterial disease is transmitted from psyllid to healthy trees after it feeds on infected plant tissue. Asian Citrus Psyllid is a small insect, for example the size of an aphid that can vector the deadly huanglongbing (HLB) bacteria, sometimes called Citrus Greening disease.

The ACP is the only known insect that can transmit the disease that begins as a general decline in the health of the tree, with bitter and poorly molded fruits, and always leads to the death of the tree. There is no known treatment once infected with HLB. As mentioned in its common name, citrus fruits and closely related species can harbour insect and disease. For more information on identification, management and education, see: California Citrus Threat`s Website, UC Davis IPM for Asian Citrus Psyllid and UC Division of Agriculture and Natural Resources.