Huanglongbing (HLB)

Regulation and Quarantine Boundaries

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

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).

Quarantine Map Overview

Options available for viewing the quarantine boundary maps:

2023 HLB Overview