University of California - Riverside. Center for Invasive Species Research.

Louisiana State University. AgCenter Research and Extension.

Citrus canker, a serious disease of citrus, was recently found on trees in East Baton Rouge and Livingston parishes, according to LSU AgCenter plant doctor Raj Singh. Citrus canker is a highly contagious bacterial disease that was first detected around 1914 in Louisiana and declared eradicated by 1940. The disease is known to cause defoliation, premature fruit drop, blemished fruit and tree decline. Severely infected trees ultimately may stop producing fruit. If you believe your citrus trees have citrus canker, contact the U.S. Department of Agriculture at 225-298-5410 or the LDAF Horticulture and Quarantine Division at 225-952-8100. 

University of California. Agriculture and Natural Resources.

ANR Publication 8218

USDA. APHIS. Plant Protection and Quarantine.

Provides comprehensive citrus canker information including: what to look for, how to prevent this disease and how it is treated. Also provides image gallery and information how to report signs of citrus disease. And provides control information including: history of citrus canker in the U.S., current quarantine boundaries, regulations, and potential actionable suspect sample policy. 

USDA. Animal and Plant Health Inspection Service.

Explore this story map to see how you can help combat this damaging citrus disease in Texas. Provides an overview, quarantined areas, and how to report a sick tree.
See related resource: Data Visualization Tools to explore plant and animal health management data and interactive story maps

Florida Department of Agriculture and Consumer Services. Plant Industry.

American Phytopathological Society.

USDA. APHIS. PPQ. CPHST. Identification Technology Program.

USDA. Animal and Plant Health Inspection Service.

Select layer to view quarantine by species (Asian citrus psyllid, citrus black spot, citrus canker,  citrus greening, sweet orange scab).
See related resource: Data Visualization Tools to explore plant and animal health management data and interactive story maps

Florida Department of Agriculture and Consumer Services. Plant Industry.

USDA. APHIS. Plant Protection and Quarantine.

Contains the requirements for moving fruit, nursery stock, or other regulated articles for several citrus pests and diseases.

Louisiana State University. AgCenter Research and Extension.

Publication 3269
See also: Plant Diagnostic Center - Publications for more resources

U.S. Government Printing Office. Electronic Code of Federal Regulations.

University of Florida. Institute of Food and Agricultural Sciences Extension.

Electronic Data Information Source - publication resources

European and Mediterranean Plant Protection Organization.

USDA. APHIS. Plant Protection and Quarantine.

Contains the legal description of current federal quarantine areas for several citrus pests and diseases (Asian citrus pysllid, citrus black spot,  citrus canker, citrus greening, sweet orange scab),  Users can search by state and pest to determine the quarantine area(s) by state and territories.

IUCN. Species Survival Commission. Invasive Species Specialist Group.

Google.

Smithsonian Institution. Smithsonian Marine Station at Fort Pierce.

New South Wales Department of Primary Industries (Australia).