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Postharvest Programs & Information

Mission Statement

The University of Florida's Postharvest mission is to support Florida's diverse Postharvest horticulture industries through research, extension and teaching. Our goal is to generate and disseminate information so that perishable horticultural commodities are delivered to consumers fresh, safe, nutritious and in the form (e.g. ripe or fresh-cut) consumers desire.

What's New:

Federal Register Publication of the Final Citrus Canker Rule
(Vol. 72, No. 222/ Monday, Nov. 19, 2007)

Information regarding Peroxyacetic Acid (PAA) and its efficacy to treat Citrus Canker bacteria

Revised Risk Management Analysis

Final Regulatory Impact & Flexibility Analyses

Environmental Assessment

Resources for Identifying Citrus Canker on Fruit

USDA APHIS Citrus Canker Information Website.

USDA Card Deck with great pictures of Canker and HLB symptoms on citrus fruit and leaves.

Added page of the USDA Card Deck showing young lesions.

Packinghouse Canker ID Training Materials from Holly Chamberlain (UF IFAS)
1 Slide per page 6 Slides per page 8 x 11 Sheet
1 Slide per page (Spanish) 6 Slides per page (Spanish)

Narrated (by Dr. Tim Schubert) PowerPoint Presentation

Close-up, Pictures of Citrus Canker (incl. of very YOUNG/SMALL Lesions
Suitable for printing on 8.5" x 11" sheets.

Materials from DPI (visit DPI main Canker or CHRP sites)
   Fruit Movement Notice

   Decontamination Training Video

   Canker ID Poster

   Pictures comparing canker at different stages to some other peel blemishes
     1 Slide per page                                   6 Slides per page

Canker Identification Card for Posting in the Packinghouse

   360 degree views of citrus fruit with canker and other peel blemishes.
     Click here for a Flash program showing several disorders.

     Below are individual 360 degree views of various citrus fruit disorders (QuickTime Player Required).
     Each is ~4 MB, so allow some time for each to load. Once loaded, one can "grab", rotate
     and zoom each view as desired.

Citrus Canker 1	Citrus Canker 2	Citrus Canker 3	Citrus Canker 4
Citrus Canker 5	Citrus Canker 6	Citrus Canker 7	Citrus Canker 8
Citrus Canker 9	Citrus Canker 10	Citrus Canker 11	Citrus Canker 12
Citrus Canker 13	Citrus Canker 14	Citrus Canker - Lime

Citrus Canker & Mechanical Damage

Mechanical Damage 1	Mechanical Damage 2	Mechanical Damage 3	Mechanical Damage 4
Mechanical Damage 1	Mechanical Damage 1	Mechanical Damage 1	Mechanical Damage 1

Canker & Melanose 1	Canker & Melanose 2

Melanose 1	Melanose 2	Melanose 3

Alternaria & Melanose 1	Alternaria & Melanose 2

Alternaria 1	Alternaria 2	Alternaria 3	Alternaria 4
Alternaria 5

Alternaria & Scab	Scab	Leaf Miner

Identification of Diseases, Peel Injuries, and Blemishes of Florida Fresh Citrus Fruit (33 MB file!)
Eldon Brown (Florida Department of Citrus), 1998
Click here for a format easier to print (print double sided and fold the stack of printed pages in half to obtain a booklet).

University of Florida Canker Resources
Florida Citrus Pest Management Guide: Citrus Canker - Citrus canker, caused by the bacterium Xanthomonas axonopodis pv. citri, is a leaf, fruit and stem spotting disease that affects numerous species, cultivars, and hybrids of citrus and citrus relatives.

UF Citrus Canker Field Identification - "Walking the rows of the citrus grove, look carefully from top of tree canopy to bottom of tree canopy for the circular, yellow halos on leaves."

CITRUS CANKER DISEASE Information, by Dean W. Gabriel

Canker Bibliography - Listing of various Citrus Canker related papers.

Canker Information from Other Government, Universities & Research Institutions
(Links to Non-University of Florida/IFAS sites are provided as a service and do not imply endorsement of information or products)

USDA ESTABLISHES REGULATIONS FOR FRUIT MOVEMENT FROM FLORIDA (August 1, 2006)

Click here for the Federal Register Regulations concerning citrus movement from Florida
Federal Register, 43345 Vol. 71, No. 147 Tuesday, August 1, 2006

Citrus Canker - "Florida Department of Agriculture and Consumer Services, The Threat to Florida's citrus..."

Code of Federal Regulations (CFR 301). See 301.75 for Citrus Canker. CHAPTER III--ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE, PART 301--DOMESTIC QUARANTINE NOTICES.

Bacterial Citrus Canker. By T. S. Schubert and X. Sun. Plant Pathology Circular No. 377. Fl. Dept. of Agriculture & Cons. Svcs., Division of Plant Industry.

Historical Museum of Southern Florida - "CITRUS CANKER. It wasn't a worm as one might think by the name, but a terrible germ disease that could be scattered by the wind or by birds or by no one knew just how."

Citrus canker Information from Australian Queensland Department of Primary Industries and Fisheries.

Citrus Canker Eradication Program - Environmental Assessment, April 1999.

Isolation and characterization of mutants of the citrus canker pathogen Xanthomonas axonopodis pv. citri that induce a distinct pattern of disease. Shu Yun Tung and Tsong Teh Kuo. 2000. Can. J. Bot. 78: 1002–1009 (2000).

Table of Maximum Residue Limits (MRLs) (updated October 2007) for Citrus for the U.S. & Selected Export Markets

Chemical Residue Tolerance Information For:

The International Maximum Residue Limits Database - USDA Foreign Agricultural Service

U.S.A. Title 40 of the code of federal regulations.

   Japan:
      Provisional English translation of the new law and related new provisional MRLs
          - EFFECTIVE May 29, 2006.
      Combined list of the final Provisional MRLs and existing MRLs (only in Japanese)

Europe (at http://europa.eu.int/comm/food/index_en.htm)

Information and updates to EC MRLs

Information: http://www.pesticides.gov.uk/food_industry.asp?id=23

Potential & Agreed MRLs: http://www.pesticides.gov.uk/food_industry.asp?id=546

Codex Alimentarius (Click for the CODEX Alimentarius home page)
Canada (at http://www.pmra-arla.gc.ca/english/legis/maxres-e.html)

Featuring:
Complete Packinghouse Newsletter Database plus Index

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