An intensive risk survey in Cerritos, Los Angeles County, resulted in the discovery of Huanglongbing in a single orange tree. California Department of Food and Agriculture staff began the survey after a sample of Asian citrus psyllids from the area was found to be positive for the bacteria that causes HLB.
The diseased tree was located across the street from the property where bacteria-carrying psyllids were detected. PCR testing confirmed the disease yesterday, but the diseased tree was actually removed last week thanks to the homeowners proactively granting permission to CDFA staff. This is another example of the risk survey helping CDFA staff find and eradicate HLB positive trees, and successfully collaborate with homeowners in urban areas.
The survey in Cerritos is nearly complete, and mandatory Asian citrus psyllid treatments will begin Jan. 9. This detection will result in a new HLB quarantine encompassing portions of Los Angeles and Orange Counties. A quarantine map will be released shortly. CDFA recently completed treatments in San Gabriel and is nearing completion on treatments in Hacienda Heights; surveys in both areas will continue.
Source: ucanr.edu