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EDIS Update

New and revised publications in the EDIS publications database

    Anthurium Diseases: Identification and Control in Commercial Greenhouse Operations (PP292)

    April 9th, 2012
    Topic(s):Nursery & Greenhouse

    Figure 1. Anthurium 'Kozohara' used in cut-flower productionBecause of its attractive, long-lasting flowers, Anthurium is popular as both an exotic cut-flower crop and as a flowering potted-plant crop. Growers most often report two bacterial diseases and three fungal diseases in their commercial greenhouse environments. This article provides guidelines to identify and treat diseases that may be encountered during commercial greenhouse production of Anthurium.This 7-page fact sheet was written by David J. Norman and Gul Shad Ali, and published by the UF Department of Plant Pathology, March 2012.
    http://edis.ifas.ufl.edu/pp292

    Citrus Diseases Exotic to Florida: Citrus Yellow Mosaic (PP293)

    March 1st, 2012
    Topic(s):Citrus

    Figure 1. Mosaic symptoms induced by Citrus yellow mosaic virus on the leaves of 'Sathgudi' sweet orange. Citrus yellow mosaic is an important viral disease in India, where it causes significant yield reduction. In some groves, infection rate may be as high as 70%. CYMV induces a bright yellow mottling or vein flecking that persists in mature leaves. Yields are sharply reduced in chronically infected ‘Sathgudi’ sweet orange trees in India, and fruit may also show mosaic symptoms. This 2-page fact sheet was written by K.-R. Chung and R. H. Brlansky, and published by the UF Department of Plant Pathology, February 2012.
    http://edis.ifas.ufl.edu/pp293

    Citrus Diseases Exotic to Florida: Mal Secco (PP290)

    February 29th, 2012
    Topic(s):Citrus

    Figure 3. Orange-reddish discoloration of an orange limb affected by mal secco disease.Mal secco, Italian for “dry disease”, is a fungal disease that causes serious damage to a number of citrus cultivars in the Mediterranean and Black Sea areas, but has not been reported in other citrus-growing regions. The main diagnostic field symptom is that wood of affected limbs has a reddish-yellow stain. This 3-page fact sheet was written by K.-R. Chung, and published by the UF Department of Plant Pathology, February 2012.
    http://edis.ifas.ufl.edu/pp290

    Citrus Diseases Exotic to Florida: Satsuma Dwarf (PP291)

    February 24th, 2012
    Topic(s):Citrus

    Figure 1. Boat-shaped leaves appearing on Satsuma mandarin infected with Satsuma dwarf virus.Satsuma dwarf is a virus disease that was first reported in the early 1930s in Japan. The disease causes serious problems in citrus because it reduces tree vigor and fruit yield. Satsuma dwarf has also been reported in mandarin-growing areas in China, Korea, and Turkey, where it was likely introduced through importation of infected budwood from Japan. This 2-page fact sheet was written by K.-R. Chung and R.H. Brlansky, and published by the UF Department of Plant Pathology, February 2012.
    http://edis.ifas.ufl.edu/pp291

    Citrus Diseases Exotic to Florida: Powdery Mildew (PP288)

    November 7th, 2011
    Topic(s):Citrus

    Powdery mildew on mandarin young fruit.Powdery mildew, which affects almost all citrus cultivars, is a common fungal disease problem in Asian countries. This 2-page fact sheet provides background information for this disease to provide a basis for evaluating potential risk to Florida citrus and for aiding decision-making to prevent its introduction and spread in Florida. It was written by K.-R. Chung and published by the UF Department of Plant Pathology, October 2011.
    http://edis.ifas.ufl.edu/pp288

    Groundnut Ringspot Virus in Florida (PP282)

    August 17th, 2011
    Topic(s):Crops

    roling and bronzed tomato plant leavesGroundnut ringspot virus was recently identified in tomatoes in South Florida — the first report in the United States. It can infect tomato plants at all stages of growth and lead to unmarketable fruits or plant death. This 4-page fact sheet shares what is known about the symptoms, host range, disease transmission, and management. Written by Eugene McAvoy, Scott Adkins, Craig Webster, Charles Mellinger, Loren Horsman, Galen Frantz, Stuart Reitz, and Shouan Zhang, and published by the UF Department of Plant Pathology, July 2011.
    http://edis.ifas.ufl.edu/pp282

    Field Identification of Citrus Canker Symptoms and Decontamination Procedures (PP214/PP136)

    August 4th, 2011
    Topic(s):Citrus

    necrotic canker lesions on grapefruit
    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

    2011 Florida Plant Disease Management Guide: Apple (Malus domestica) (PDMGV305/PG004)

    August 1st, 2011
    Topic(s):Crops

    diseased apple
    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

    Branch Dieback of Syzygium paniculatum (Eugenia) (PP283)

    July 21st, 2011
    Topic(s):Lawn & Garden, Nursery & Greenhouse

    Eugenia
    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

    Sudden Oak Death and Ramorum Blight (PP197/PP118)

    March 24th, 2011
    Topic(s):Lawn & Garden, Nursery & Greenhouse

    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

    Brown Patch (SSPLP5/LH044)

    March 9th, 2011
    Topic(s):Lawn & Garden, Turf / Sod

    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)

    March 9th, 2011
    Topic(s):Lawn & Garden, Turf / Sod

    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)

    March 9th, 2011
    Topic(s):Crops

    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)

    February 28th, 2011
    Topic(s):Citrus

    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

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