Huanglongbing (HLB)

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).

Options available for viewing the quarantine boundary maps:

State Overview

For reference Only
State Overview Map with Grids and Links

Map containing grid numbers linking to specific areas in California.
Active Quarantines Web Application

10/23/2024
HLB Overall Quarantine Boundary Layer

10/23/2024
Boundary Maps: Maps section below. Click on a grid number to open map to specific area in California.