Citrus Greening

Scientific name: Candidatus Liberibacter asiaticus

Common names: Citrus greening, Huanglongbing (HLB), yellow shoot disease, yellow dragon disease

Native To: China

Date of U.S. Introduction: First discovered in Florida in 2005, and in Louisiana in June 2008

Images: Invasive.org and Google and Citrus Greening Image Gallery

Means of Introduction: Not determined; possibly through illegally imported plant material

Impact: Bacterial disease that infects citrus trees, where it destroys fruit and causes decreased production

Current U.S. Distribution:

• Florida Citrus Canker and Citrus Greening Map (PDF | 1.6 MB) - updated weekly

Quarantine:

• National Quarantine Map - Citrus Green and Asian Citrus Psyllid (2.9 MB)
• Regulatory Updates (includes Federal domestic quarantine orders)
• Huanglongbing (HLB)/Citrus Greening Disease Quarantine Information

Management Plans: Microbes / Citrus Health

Selected Internet Resources:

• Federal Government
• State Government
• University/Academic
• International
• Organizations

Recovery Plan for Huanglongbing (HLB) or Citrus Greening (Oct 17, 2006; PDF | 488 KB)
USDA. Agricultural Research Service.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Dispersion; Controls

Liberibacter asiaticus Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Citrus Greening
USDA. Animal and Plant Health Inspection Service.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Dispersion; Legal Aspects

Citrus Greening
ITAP.gov.
Identification/Description; Photographs; Introduction History; Impacts;

State Government

Citrus Health Response Program
Florida Department of Agriculture and Consumer Services. Plant Industry.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Dispersion; Controls; Legal Aspects

Citrus Greening - Huanglongbing (Yellow Dragon Disease): A New Threat to Florida Citrus
State of Florida. Broward County Parks and Recreation Division. Extension Education.
Photographs; Introduction History; Legal Aspects

Asian Citrus Psyllid (ACP) and Huanglongbing (HLB)
California Department of Food and Agriculture.
Identification/Description; Photographs; Impacts

Citrus Bacterial Canker Disease and Huanglongbing (Citrus Greening) (PDF | 634 KB)
University of California. Agriculture and Natural Resources.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Dispersion; Controls

Asian Citrus Psyllid and Huanglongbing Disease Information (PDF | 22 KB)
University of California at Davis. Statewide Master Gardener Program.
Identification/Description; Introduction History; Impacts

Citrus Diseases Exotic to Florida: Huanglongbing (Citrus Greening)
University of Florida. Institute of Food and Agricultural Sciences.
Identification/Description; Photographs; Impacts; Habitat; Dispersion

2008 Florida Citrus Pest Management Guide: Huanglongbing (Citrus Greening)
University of Florida. Institute of Food and Agricultural Sciences.
Identification/Description; Controls

Citrus Greening (Huanglongbing)
University of Florida. IFAS. Citrus Research and Education Center.
Identification/Description; Photographs; Introduction History; Impacts; Dispersion; Controls; Legal Aspects

Citrus Greening – Another Threat to Agriculture
University of Florida. IFAS. Okeechobee County Extension Service.
Identification/Description; Photographs; Dispersion

Huanglongbing / Citrus Greening (Liberibacter asiaticus)
University of Florida. IFAS. Southern Plant Diagnostic Network.
Introduction History; Dispersion; Controls; Special Note: Huanglongbing Training Program Materials and Video

Citrus Greening and its Psyllid Vector - Radcliffe's IPM World Textbook
University of Minnesota.
Identification/Description; Photographs; Impacts; Dispersion

Citrus Greening Disease (PDF | 28 KB)
Oregon State University. Extension Service.
Identification/Description; Life Cycle; Distribution

Economic Impacts of Greening on the Texas Citrus Industry (Feb 2007; PDF | 208 KB)
Texas A&M University. Center for North American Studies.
Impacts; Distribution

International

Data Sheets on Quarantine Pests: Citrus greening bacterium (PDF | 52 KB)
European and Mediterranean Plant Protection Organization.
Taxonomy; Identification/Description; Impacts; Distribution; Dispersion; Controls; Special Note: Bibliography

Exotic plant pests: Citrus greening (Huanglongbing)
Queensland Department of Primary Industries and Fisheries.
Identification/Description; Photographs; Distribution; Dispersion; Controls

Huanglongbing disease of citrus trees - Pest Advisory Leaflet No. 45 (Jun 2005; PDF | 231 KB)
Secretariat of the Pacific Community. Plant Protection Service.
Identification/Description; Photographs; Impacts; Distribution; Dispersion; Controls

Citrus Huanglongbing: The Pathogen and Its Impact (Sep 2007)
American Phytopathological Society.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Dispersion

Is a Disease-Carrying Insect Killing Your Citrus Tree?
Citrus Research Board.
Identification/Description; Photographs; Introduction History; Impacts

Asian citrus psyllids (Sternorrhyncha: Psyllidae) and greening disease of citrus: a literature review and assessment of risk in Florida (PDF | 155 KB)
Florida Entomologist.
Taxonomy; Impacts; Distribution; Dispersion; Controls

Citrus greening
Invasive.org.
Photographs

Huanglongbing: A Destructive, Newly-Emerging, Century-Old Disease of Citrus (PDF | 1.8 MB)
Journal of Plant Pathology.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Distribution; Controls