Citrus canker, caused by the bacterial pathogen Xanthomonas citri subsp. citri, is a serious disease of citrus. The disease causes necrotic dieback, general tree decline, premature fruit drop, and fruit blemishes. Severely infected trees become weak, unproductive, and unprofitable. Learn how to identify citrus canker and proper procedures for decontamination with this 5-page fact sheet written by Mongi Zekri, Megan Dewdney, Jamie Yates, and Pamela Roberts, and published by the UF Department of Plant Pathology, July 2011.
http://edis.ifas.ufl.edu/pp136
Tag: Plant Pathology Department
2011 Florida Plant Disease Management Guide: Apple (Malus domestica) (PDMGV305/PG004)
This updated 13-page fact sheet from the 2011 Florida Plant Disease Management Guide highlights several common diseases affecting apples in Florida and includes short list of fungicides approved for disease management of apple in Florida. Written by Mathews L. Paret, Tim Momol, Laura Ritchie, and Hank Dankers, and published by the UF Department of Plant Pathology, July 2011. (photo courtesy of Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org)
http://edis.ifas.ufl.edu/pg004
Identification of Early Citrus Black Spot Symptoms (Identificacíon de los Síntomas Iniciales de la Mancha Negra de los Cítricos) (PP285)
This bilingual identification sheet was designed to assist packinghouse employees to identify the early yet subtle symptoms of citrus black spot. Proper identification of citrus black spot prevents the rejection of international fruit shipments. Written by M. M. Dewdney, J. D. Yates, and M. A. Ritenour and published by the UF Department of Plant Pathology, July 2011.
http://edis.ifas.ufl.edu/pp285
Branch Dieback of Syzygium paniculatum (Eugenia) (PP283)
Eugenia’s popularity stems from its dense, attractive foliage, the ease with which the canopy can be sculpted, and its relatively carefree management. But shortly after Hurricane Wilma in November 2005, a serious dieback disease began to affect nursery production of eugenia in the Homestead area. Since then, the disease has become prevalent, affecting local nurseries throughout South Florida. Learn more about this disease and its management in this 4-page fact sheet written by A. J. Palmateer and T. L. B. Tarnowski, and published by the UF Department of Plant Pathology, July 2011.
http://edis.ifas.ufl.edu/pp283
Quick Reference Guide to Foliar Fungicides (PP275)
This revised 2-page reference guide provides quick access to foliar fungicide recommendations from the Florida Citrus Pest Management Guide. Verso provides guidelines for fungicide resistance management. Written by M. M. Dewdney and published by the UF Department of Plant Pathology, April 2011.
http://edis.ifas.ufl.edu/pp275
Sudden Oak Death and Ramorum Blight (PP197/PP118)
Sudden oak death and ramorum blight are relatively new diseases capable of causing a range of symptoms, from leaf spots to plant death, on many woody hosts. Because these diseases are new, much about the pathogen, host range, and disease epidemiology is unknown. Currently, neither sudden oak death nor ramorum blight is established in Florida, but state agencies and university educators continue to work together to monitor for these diseases. This revised 4-page fact sheet describes the causal agent and gephgraphical distribution, host range, disease symptoms, and control options. Written by Phil Harmon and Carrie Harmon, and published by the UF Department of Plant Pathology, March 2011.
http://edis.ifas.ufl.edu/pp118
Homeowner’s Guide to Fungicides for Lawn and Landscape Disease Management (PP233/PP154)
Homeowners are often discouraged from using fungicide products to manage diseases of the lawn and landscape, but many fungicides are packaged for and marketed to homeowners. This 5-page fact sheet provides guidance in using fungicides appropriately to manage some lawn and landscape diseases. Written by Phil Harmon, Aaron Palmateer, Rachel Ribbeck, and published by the UF Department of Plant Pathology, March 2011.
http://edis.ifas.ufl.edu/pp154
Brown Patch (SSPLP5/LH044)
Brown patch, large patch, or Rhizoctonia blight is a fungal disease observed November through May that infects the leaf area closest to the soil, eventually killing the leaf. This 3-page fact sheet was written by M. L. Elliott and P. F. Harmon and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh044
Take-all Root Rot (SSPLP16/LH079)
Take-all root rot, or Bermudagrass decline, is a root rot disease triggered by high rainfall or stress and manifesting as irregular yellow or light green patches two to three weekds after the pathogen has been active in the roots. This 3-page fact sheet was written by M. L. Elliott and P. F. Harmon and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh079
Management of Gummy Stem Blight (Black Rot) in Cucurbits in Florida (PP280)
Gummy stem blight (GSB) is a major disease of many cucurbits, including watermelon, cantaloupe, cucumber, pumpkin, squash, muskmelon, and other melons. The disease is also known as black rot due to its characteristic appearance on infected fruits. Learn the symptoms, causal agent and disease spread, and fungicides labeled for use in Florida. This 9-page fact sheet was written by Mathews L. Paret, Nicholas S. Dufault, and Stephen M. Olson , and published by the UF Department of Plant Pathology, January 2011.
http://edis.ifas.ufl.edu/pp280
Citrus Black Spot: No Longer an Exotic Disease (PP281)
Citrus black spot is an emerging fungal disease that affects Florida citrus. Various symptom types occur about a month before harvest. Black spot has the potential to cause major economic damage to the fresh fruit industry and significant yield loss on processing varieties. This trifold brochure was written by Megan Dewdney and Jamie Yates, and published by the UF Department of Plant Pathology, January 2011.
http://edis.ifas.ufl.edu/pp281
Cercospora Leaf Spot (SSPLP57/LH082)
Cercospora leaf spot is a fungal disease of St. Augustinegrass observed during periods of frequent rainfall. This revised 2-page fact sheet was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh082
Rust (SSPLP12/LH051)
Rust is a fungal disease that occurs in cool weather causing yellow specks enlarging to spots with orange pustules in St. Augustinegrass and zoysiagrass. This revised 2-page fact sheet was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh051
Pythium Root Rot (SSPLP11/LH050)
This fungal root disease affecting all warm-season turfgrasses is associated with wet soil conditions causes nonspecific decline in turf quality. This revised 2-page fact sheet was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh050
Helminthosporium Leaf Spot (SSPLP9/LH048)
This fungal disease is most serious on bermudagrass and acts over a wide range of temperatures. This 2-page fact sheet was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh048
Exotic Citrus Diseases: Early Detection is the Solution to Protecting Florida Citrus (CH202)
This revised illustrated trifold brochure provides key information about Pseudocercospora fruit and leaf spot, sweet orange scab, citrus leprosis virus, citrus variegated chlorosis (CVC), and citrus tristeza virus (CTV) stem pitting. Includes contact information for UF/IFAS Extension citrus experts. Written by R. H. Brlansky, M. M. Dewdney, and J. D. Yates, and published by the UF Department of Plant Pathology, June 2010.
http://edis.ifas.ufl.edu/ch202
Gray Leaf Spot (SSPLP8/LH047)
This disease affects primarily St. Augustinegrass, but also centipedegrass. It is most often observed from late spring to early fall, especially during prolonged periods of rainfall. This revised 2-page fact sheet was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh047
Fairy Rings (SSPLP7/LH046)
Fairy rings, especially the mushrooms, are most commonly observed during the summer months, when Florida receives the majority of its rainfall. This revised 2-page fact sheet with identification and control information was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh046
Anthracnose (SSPLP56/LH043)
Identify and control for this disease that often appears as reddish-brown spots surrounded by a narrow yellow halo, primarily in centipedegrass. This revised 2-page fact sheet was written by M. L. Elliott and P. F. Harmon, and published by the UF Department of Plant Pathology, February 2011.
http://edis.ifas.ufl.edu/lh043
PP279/CG088 2011 Florida Citrus Pest Management Guide: Citrus Black Spot
PP279, a 6-page fact sheet by Megan M. Dewdney, Timothy S. Schubert, Mark R. Estes, and Natalia Peres, provides citrus producers with essential information for management of this fungal disease that causes fruit blemishes and significant yield losses — regulatory considerations and recommended chemical controls. Published by the UF Department of Plant Pathology, December 2010.
http://edis.ifas.ufl.edu/cg088