CDFA Plant Health

Huanglongbing (HLB) Quarantine Information

The Huanglongbing (HLB) quarantine page has moved to:

 wedge Pest Hotline: 1-800-491-1899
Blotchy Mottle Symptom of HLB disease in Citrus leaves (Photo courtesy of CDFA Plant Pest Diagnostics Center)

The plant disease known as Huanglongbing (HLB) is believed to be caused by a phloem-restricted bacterium which is vectored by the Asian Citrus Psyllid (ACP).