Tag: Aaron J. Palmateer

Mancha foliar causada por Xanthomonas en Ficus elastica

Figure 5. High incidence and severity of Xanthomonas blight on F. elastica.En verano del 2010, en viveros de Homestead se reportaron casos de Ficus elastica con manchas foliares circulares que se asemejan a los síntomas causados por la bacteria fitopatógena Xanthomonas campestris pv fici, aún no reportada en Ficus elastica. El daño severo affectó a la mayoría de los productores comerciales del sur de la Florida. This is the Spanish language version of Bacterial Blight of Ficus elastic Caused by Xanthomonas (PP305). This 3-page fact sheet was written by E. V. Campoverde, A. J. Palmateer, and P. Lopez, and published by the UF Department of Plant Pathology, July 2014.
http://edis.ifas.ufl.edu/pp312

Impatiens Downy Mildew

Figure 2. Faint gray lines may be seen on the tops of leaves, or leaf edges may curl downward.Downy mildew on impatiens is of great concern throughout Florida. Winters in south Florida provide high humidity paired with cool nights, creating ideal conditions for disease development. Downy mildews are caused by several different species of pathogens that tend to be plant-host specific. Plasmopara obducens is the pathogen that affects impatiens. Some literature indicates that nighttime temperatures of about 50 to 72°F favor downy mildew, but the disease has been reported on impatiens year round in south Florida. This 4-page fact sheet was written by L. Sanagorski, B. Schall, A.J. Palmateer, and N.A. Peres, and published by the UF Department of Plant Pathology, October 2013.
http://edis.ifas.ufl.edu/pp309

Tomato Chlorotic Spot Virus

Figure 3. Fruit from a tomato plant infected with Tomato chlorotic spot virus showing deformation and discoloration. Credit: J. E. PolstonTomato chlorotic spot virus (TCSV) is a tospovirus, similar to but distinct from other tospoviruses currently present in Florida. Like these viruses, TCSV is transmitted by thrips and is able to replicate in both the vector and the plant. TCSV was first reported in Florida in 2012 in tomato plants in Miami-Dade and Lee Counties, but it may have been in the state for several years. Prior to 2012, TCSV was only known to occur in Brazil and Argentina. It is not known how this virus was introduced into Florida. This 5-page fact sheet was written by Jane E. Polston, Erin Wood, Aaron J. Palmateer, and Shouan Zhang, and published by the UF Department of Plant Pathology, May 2013.
http://edis.ifas.ufl.edu/pp306

Bacterial Blight of Ficus elastica Caused by Xanthomonas (PP305)

Figure 5. High incidence and severity of Xanthomonas blight on F. elastica. In the summer of 2010, leaf blight cases were reported on several Ficus elastica cultivars in Homestead nurseries. Symptoms somewhat resembled those caused by Xanthomonas campestris p.v. fici, but this pathogen has never been reported to occur on Ficus elastica. The outbreak was severe, and the majority of commercial producers in the southern portion of the state were affected. The widespread outbreak from 2010 to date has caused many nurseries to lose entire Ficus elastica crops. This 3-page fact sheet describes the symptoms and disease management recommendations. Written by E. V. Campoverde and A. J. Palmateer, and published by the UF Department of Plant Pathology, April 2013.
http://edis.ifas.ufl.edu/pp305

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

Branch Dieback of Syzygium paniculatum (Eugenia) (PP283)

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

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

PP24/VH049 Florida Plant Disease Management Guide: ‘Tahiti’ Lime (Citrus latifolia)

Revised! PP24, a 9-page illustrated fact sheet by Tara Tarnowski, Aaron J. Palmateer, Ian Maguire, and Jonathan H. Crane, provides an overview of disease management for 'Tahiti' lime, with symptoms, casual organisms/agents, disease cycle and epidemiology, and management information for several key diseases. Includes references. Published by the UF Department of Plant Pathology, October 2009.
http://edis.ifas.ufl.edu/VH049

PP256/PP172 Rusts on Ornamentals in Florida

PP-256, a 6-page illustrated fact sheet by Philip F. Harmon, Carrie L. Harmon, Aaron J. Palmateer, Stephen H. Brown, presents information on four representative rust diseases of ornamentals, including gladiolus rust, daylily rust, frangipani rust, and guava rust. Includes references. Published by the UF Department of Plant Pathology, May 2009.
http://edis.ifas.ufl.edu/PP172