Tag: Plant Pathology Department

Anthracnose Fruit Rot of Strawberry (PP207/PP130)

Figure 1. Anthracnose lesions on a ripe fruitAnthracnose fruit rot is an important disease for strawberry worldwide. Lesions appear as dark, sunken spots on infected fruit. This 4-page fact sheet was written by James C. Mertely and Natalia. A. Peres, and published by the UF Department of Plant Pathology, September 2012.
http://edis.ifas.ufl.edu/pp130

Colletotrichum Crown Rot (Anthracnose Crown Rot) of Strawberries (PP238/PP156)

Figure 1. Initial symptoms of Colletotrichum crown rotColletotrichum crown rot is caused by the fungi Colletotrichum gloeosporioides and Colletotrichum fragariae. Both pathogens kill strawberry plants by aggressively invading crown tissue. Crown rot is a serious disease in warm production regions, such as those in the southeastern United States. This 3-page fact sheet was written by Natalia A. Peres and Steven J. MacKenzie, and published by the UF Department of Plant Pathology, September 2012.
http://edis.ifas.ufl.edu/pp156

Fusarium Wilt of Canary Island Date Palm (PP215/PP139)

Figure 1. Overview of canopy of Canary Island date palm with Fusarium wilt. The black arrows point to leaves that are dying.As the name implies, Fusarium wilt of Canary Island date palm is primarily observed on the Canary Island date palm. It was first documented in the United States in the 1970s in California, but it was not documented in Florida until 1994. It now occurs throughout the state. The fungus obstructs the xylem (water-conducting) tissue, which results in desiccation and death. This 5-page fact sheet was written by Monica L. Elliott, and published by the UF Department of Plant Pathology, July 2012.
http://edis.ifas.ufl.edu/pp139

Bud Rot of Palm (PP220/PP144)

Figure 3. Bud rot of Cocos nucifera: no new leaves are emerging and crown is open-topped, while older leaves in canopy look healthy at this time.To understand bud rots, an explanation of palm anatomy is necessary. The growing point of the palm is often called the bud or heart. All leaves originate from there, and each palm stem has only one. Thus, when the bud is damaged or diseased, the palm usually dies. The first symptom is discoloration and wilting of the spear leaf and wilting/discoloration of the next youngest leaf. This 4-page fact sheet was written by Monica L. Elliott, and published by the UF Department of Plant Pathology, July 2012.
http://edis.ifas.ufl.edu/pp144

Integrated Disease Management for Vegetable Crops in Florida (PP193/PP111)

Figure 1. Disease triangle indicating interaction of the pathogen, host, and the environment leading to a plant disease Integrated Pest Management (IPM) as applied to vegetable diseases means using all the tactics available to the grower (cultural, biological, host-plant resistance, field scouting, chemical) that provide acceptable yield and quality at the least cost and are compatible with the tenets of environmental stewardship. This 6-page fact sheet was written by Mathews Paret, Nick Dufault, Tim Momol, Jim Marois, and Steve Olson, and published by the UF Department of Plant Pathology, August 2012.
http://edis.ifas.ufl.edu/pp111

Postharvest Quality and Decay Incidence among Tomato Fruit as Affected by Weather and Cultural Practices. (PP294)

Figure 11. Concentric cracking of fruit surface.Postharvest decay losses for field-grown, fresh-market tomatoes are usually associated with harvests that occur when fields are wet and warm. During periods of persistently wet fields, decay pathogens infect damaged fruit on the plant as well as injuries to petioles and stems. Review of all reports and photos implicated excessive water in fruit rather than air temperatures as the primary predisposition. Excessive water in fruit is possible at virtually any time of the season and can appear at times of cold as well as warm field temperatures. This 8-page fact sheet was written by Jerry A. Bartz, Steven A. Sargent, and John W. Scott, and published by the UF Department of Plant Pathology, July 2012.
http://edis.ifas.ufl.edu/pp294

Identificacion de los sintomas del cancro citrico y procedimientos de descontaminacion (PP214SP/PP138)

Figure 1. Lesiones necróticas del cancro en los tallos, hojas y frutos de toronja.El cancro cítrico es una seria enfermedad de los cítricos. La mayoría de los cultivos de cítricos son susceptibles, la toronja, la lima mejicana y algunas naranjas tempranas son las más susceptibles. Una infección severa puede causar defoliación, una muerte regresiva de la rama, una decadencia general del árbol, una caída prematura de la fruta, y manchas en la misma. Los árboles severamente infectados se vuelven débiles, improductivos y no rentables. This 5-page fact sheet was written by Mongi Zekri, Megan Dewdney, Jamie Burrow, and Pamela Roberts, and published by the UF Department of Plant Pathology, August 2012.
http://edis.ifas.ufl.edu/pp138

Mancha negra de los citricos (PP295)

Mancha negra de los cítricos p. 1
Este documento es una hoja de dos páginas ilustrativas para la identificación de la mancha negra de los cítricos. This 2-page fact sheet was written by Megan M. Dewdney and Natalia A. Peres, and published by the UF Department of Plant Pathology, August 2012. http://edis.ifas.ufl.edu/pp295

Enfermedades Exoticos de los Citricos (PP296)

Enfermedades Exóticos De Los CitricosEste documento es una hoja de dos páginas ilustrativas para la identificación de las enfermedades exóticas de los cítricos. This 2-page fact sheet was written by M. M. Dewdney, J. D. Burrow, M.E. Rogers, and T. M. Spann, and published by the UF Department of Plant Pathology, August 2012.
http://edis.ifas.ufl.edu/pp296

Enfermedades fungicas foliares de los citricos para los patios y zonas residenciales (PP297)

Enfermedades fungicas foliares de los citricosEste documento es una hoja de dos páginas ilustrativas para la identificación de las enfermedades fúngicas foliares de los cítricos. This 2-page fact sheet was written by M. M. Dewdney and J. D. Burrow, and published by the UF Department of Plant Pathology, August 2012.
http://edis.ifas.ufl.edu/pp297

Professional Disease Management Guide for Ornamental Plants (PP202/PP123)

Bob McGovern, right, checks the roots of ornamental plants with plant breeder Brent Harbaugh. Photo Thomas WrightFlorida’s warm, humid environment is a gardener’s paradise and a great location for ornamental plant producers to grow numerous plant species — but these conditions also are suitable for the development of a wide variety of plant pathogens and insects that can spread them. Florida is also a major port of entry for the international trade of ornamental plants, which carries the risk of introducing exotic invasive pathogens, so growers are required to follow certain phytosanitory regulations. These challenges require growers to develop the most efficient production plans possible, incorporating as many tactics as they can to maximize plant health and minimize opportunities for pest and disease outbreaks—a concept known as integrated pest management (IPM). This 16-page fact sheet is intended to be used by growers, landscape professionals, and other pest control operators as a reference for managing ornamental plant diseases. Written by P. F. Harmon and S. D. Bledsoe, and published by the UF Department of Plant Pathology, June 2012.
http://edis.ifas.ufl.edu/pp123

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

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)

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)

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)

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

Management of Orchid Pests with Silwet® L-77 and Horticultural Oils (PP287)

Figure 1. Some of the orchids used in the phytotoxicity study: A) Dendrobium, B) Phalaenopsis, C) Paphiopedilum, and D) Cattleya. No evidence of phytotoxicity was observed on the foliage, roots, flowers, or buds of any of the plants.IFAS researchers evaluated the ability of the surfactant Silwet® L-77 to improve the efficacy of horticultural oils in controlling boisduval scale and mite infestations in orchids. This 3-page fact sheet reports the results and provides homeowners with directions for its use. Written by R. A. Cating, M. A. Hoy, and A. J. Palmateer, and published by the UF Department of Plant Pathology, November 2011.
http://edis.ifas.ufl.edu/pp287

A Web-Based Tool for Timing Copper Applications in Florida Citrus (PP289)

Figure 1. The main web page of the ‘Citrus Copper Application Scheduler’ and its sections.The Citrus Copper Application Scheduler provides citrus growers with an easy-to-use tool to guide copper application decisions. It is an updated version of a previous copper residue model This 4-page fact sheet was written by Megan M. Dewdney, Clyde W. Fraisse, Tiago Zortea, and Jamie Burrow, and published by the UF Department of Plant Pathology, January 2012.
http://edis.ifas.ufl.edu/pp289

Dieffenbachia Diseases: Identification and Control in Commercial Greenhouse Operations (PP286)

Figure 1. Dieffenbachia in commercial productionDieffenbachia is among the top 10 most popular plants produced by commercial foliage growers in Florida. This 4-page fact sheet provides guidelines to identify and treat diseases that may be encountered during the commercial production of Dieffenbachia. Written by David Norman and published by the UF Department of Plant Pathology, October 2011.
http://edis.ifas.ufl.edu/pp286

Citrus Diseases Exotic to Florida: Powdery Mildew (PP288)

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)

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