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You are here: Home / Microbes / Species Profiles / Citrus Greening
Species Profiles

Citrus Greening

Citrus greening - Invasive.orgScientific name: Candidatus Liberibacter asiaticus

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

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Selected Resources

Native To: China (Polek 2007)

Date of U.S. Introduction: First discovered in Florida in 2005; in Louisiana in Jun 2008 (Jepson 2009); in California in Mar 2012

Means of Introduction: Possibly through illegally imported plant material; Asian citrus psyllid serves as a vector for citrus greening disease (Michaud 2004)

Impact: Bacterial disease that infects citrus trees, where it destroys fruit and causes decreased production (Polek 2007)

Current U.S. Distribution:




Selected Resources:

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Texas Citrus Greening
Texas Citrus Greening.

Invasive Species Compendium - Citrus huanglongbing (greening) disease
CAB International.

Data Sheets on Quarantine Pests - Citrus greening bacterium (PDF | 52 KB)
European and Mediterranean Plant Protection Organization.


Multi-Agency Response to Devasting Citrus Disease
U.S. Department of Agriculture.

Huanglongbing (Citrus Greening): What ARS Is Doing
USDA. Agricultural Research Service.

Citrus Greening
USDA. Animal and Plant Health Inspection Service.

Citrus Greening
USDA. APHIS. Hungry Pests.

Save Our Citrus
USDA. APHIS. Hungry Pests.

Citrus Pests - Huanglongbing
USDA. APHIS. PPQ. CPHST. Identification Technology Program.
See also: Citrus Resource

Citrus Greening

Citrus Greening (Huanglongbing)
Queensland Department of Primary Industries and Fisheries.


Asian Citrus Psyllid (ACP) and Huanglongbing (HLB)
California Department of Food and Agriculture.

Asian Citrus Psyllid and HLB
Los Angeles County Department of Agricultural Commissioner (California)

Huanglongbing (HLB)/Citrus Greening Disease Information
Florida Department of Agriculture and Consumer Services. Plant Industry.

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

Nursery Alert: Citrus Greening Disease and Asian Citrus Psyllid (Mar 2009; PDF | 148 KB)
Nevada Department of Agriculture.


Asian Citrus Psyllid (ACP) and Huanglongbing (HLB)
California Department of Food and Agriculture.

Citrus Bacterial Canker Disease and Huanglongbing (Citrus Greening) (2007; PDF | 637 KB) - ANR Publication 8218
University of California. Agriculture and Natural Resources.

Citrus Greening (Huanglongbing), Candidatus Liberibacter africanus, Candidatus Liberibacter asiaticus and Candidatus Liberibacter americanus
University of California - Riverside. Center for Invasive Species Research.

Citrus Greening (Huanglongbing)
University of Florida. IFAS. Citrus Research and Education Center.

Citrus Greening (Huanglongbing) - Publications
University of Florida. IFAS. Electronic Data Information Source.

Citrus Greening and its Psyllid Vector - Radcliffe's IPM World Textbook
University of Minnesota.

Citrus Greening Disease (Huanglongbing) (2009; PDF | 39 KB)
Oregon State University. Extension Service.


Citrus Huanglongbing: Understanding the Vector-Pathogen Interaction for Disease Management (Sep 2007)
American Phytopathological Society.

Is a Disease-Carrying Insect Killing Your Citrus Tree?
Citrus Research Board.

Huanglongbing disease of citrus trees - Pest Advisory Leaflet No. 45 (Jun 2005; PDF | 231 KB)
Secretariat of the Pacific Community. Plant Protection Service.


Jepson, S.B. 2009. Citrus Greening Disease (Huanglongbing) (PDF | 39 KB). Oregon State University. Extension Service.

Michaud, J.P. 2004. Natural Mortality of Asian Citrus Psyllid (Homoptera: Psyllidae) in Central Florida. Biological Control.

Polek, M., G. Vidalakis, and K. Godfrey. 2007. Citrus Canker: Identification in the Field and in the Laboratory (Mar 2001; PDF | 46 KB). University of California. Division of Agriculture and Natural Resources. Pub. 8218.

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Last Modified: Mar 28, 2015
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