Huanglongbing (HLB)
Regulation and Quarantine Boundaries
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 Information
Quarantine Map Overview
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 (4/20/2021)
- HLB Overall Quarantine Boundary Layer (4/20/2021)
- Boundary Maps: "MAPS" section below. Click on a grid number to open map to specific area in California.
- Quarantine Update Notification Log
| Grid #439 | Grid #440 | Grid #441 | Grid #456 | Grid #457 | Grid #458 |
| Grid #459 | New Grid #470 |
Grid #471 | > Grid #472 | Grid #482 | |
| Grid #483 |
