Progress 10/01/13 to 06/01/14
Outputs
Target Audience: The target audience includes ornamental plant producers, landscape professionals, researchers, pest control operators, homeowners and master gardeners, county extension faculty and plant disease diagnosticians Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Three master gardeners and an instructor from Miami Dade College have participated in laboratory procedures and learned the fundamentals for diagnosing plant diseases and disorders. Miami Dade Coutny master gardeners (21) attended an introduction to plant pathology and plant disease diagnsotic training in my lab. These indiduals learned the process of diagnosing a new plant disease. How have the results been disseminated to communities of interest? Results of new disease reports were disseminated during the following presentations: Ornamental plant disease management Winfield Acadamies, Orlando Florida 8/26/14 Diagnosing ornamental plant diseases, Winfield Academies, Boca Raton, Florida 8/28/14 New and newly emerging diseases of woody shrubs and trees. Internation Society of Arboriculture 4/28/14 Economically important diseases affecting tropical foliage production in Florida Dept. Plant Pathology LSU 3/25/14 Update on new and newly emerging diseases of orchids Fairchild Botanical Gardens 3/17/14 Ornamental plant disease update and management options. Miami Dade County Extension 3/18/14 Common diseases and disorders in the nursery and landscape Collier County FNGLA 3/11/14 Update on new and newly emerging diseases of tropical fruit Brevard County FL. 2/26/14 Update on new and newly emerging diseases of orchids at the Society of American Florist's pest and production management conference 2/21/14 Introduction to plant pathology and plant disease diagnostics. Lecture and "hands on" lab with Master Gardeners from South Florida. These included Miami Dade County: 10/25/13 and Broward County: 4/10/13. Palmateer, A.J. 2013. Update on common diseases affecting palms in the nursery and landscape. What do you plan to do during the next reporting period to accomplish the goals? Continue to focus on the etiology of new diseases affecting economically important ornamentals in South Florida using new and improved diagnostic techniques. Continue to conduct trials using integrated measures for disease management.
Impacts
What was accomplished under these goals?
Four new diseases were diagnosed for the state of Florida and one in Oregon. For each new disease the pathogen was characterized using morphological, cultural and molecular characteristics. A study was conducted to determine favorable conditioons for growth and sporulation of Pseudocercospora isolates from orchids. A new diagnostic technique (High Fidelity PCR) that is more sensitive for pathogen detection in the presence of plant host tissue was developed and used to detect bacterial, fungal and viral plant pathogens. This technique has become routine for use in the diagnostic clinic and is currently being evaluated in other labs especially for detecting the laurel wilt pathogen in avocado.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Sharma, K., J. Merritt, A.J. Palmateer, E. Goss, M. Smith, T. Schubert, R. Johnson, A. van Bruggen. 2014. Isolation, characterization and management of Colletotrichum spp. causing anthracnose on lucky bamboo (Dracaena sanderiana). HortScience 49 (4):1-7.
- Type:
Journal Articles
Status:
Accepted
Year Published:
2015
Citation:
Palmateer, A.J., R.A. Cating and P. Lopez. 2015. First report of downy mildew on Gynura aurantiaca caused by Plasmopara halstedii in Florida. Plant Disease (In Press).
- Type:
Journal Articles
Status:
Submitted
Year Published:
2015
Citation:
Cating, R.A., C.M. Stiles, A.J. Palmateer, M.A. Hoy, J. Uchida. 2015. Culture media for the growth and sporulation of Pseudocercospora isolates from orchids. Plant Health Progress. (Submitted).
- Type:
Journal Articles
Status:
Accepted
Year Published:
2015
Citation:
Cating, R.A., A.J. Palmateer, and P.B. Hamm. 2015. First repot of a pseudo-bulb rot of Cymbidium orchids caused by Enterobacter cloacae in the United States. Plant Disease. (Accepted).
- Type:
Journal Articles
Status:
Submitted
Year Published:
2015
Citation:
Cating, R.A., A.J. Palmateer, and M.A. Hoy. 2015. Identification and characterization of a soft-rot pathogen isolated from Vanda, Phalaenopsis, Oncidium, and Tolumnia orchids in Florida. Plant Disease. (Submitted).
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Progress 10/01/12 to 09/30/13
Outputs
Target Audience: The target audience includes ornamental plant producers, landscape professionals, researchers, pest control operators, homeowners, county extension faculty and plant disease diagnosticians. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Three highschool interns have participated in laboratory procedures and learned the fundamentals for diagnosing plant diseases and disorders. Miami Dade Coutny master gardeners (28) attended an introduction to plant pathology and plant disease diagnsotic training in my lab. These indiduals learned the process of diagnosing a new plant disease. How have the results been disseminated to communities of interest? Results of new disease reports were disseminated during the following presentations: Introduction to plant pathology and plant disease diagnostics. Lecture and “hands on” lab with Master Gardeners from three counties in South Florida. Theis includedMonroe County: 3/15/13,Miami Dade County: 10/26/12Broward County: 4/10/13. Palmateer, A.J. 2013. Update on common diseases affecting palms in the nursery and landscape. April 1st, South Florida Palm Society, Fairchild, Tropical Botanical Garden, Miami, FL. Palmateer, A.J. 2013. Update on managing impatiens downy mildew in the landscape and demonstration trials. March 15th, Florida Nursery Growers & Landscape association, Landscape Architect Nursery Tour, Miami, FL. Presentation. Palmateer, A.J. 2012. Update on new diseases affecting commercial ornamental production in South Florida. Oct 12th, Florida Nursery Growers & Landscape Association Dinner Banquet Sponsored by BASF, Capri Restaurant, Florida City, FL. Presentation. Palmateer, A.J. 2013. Update on threatening diseases occurringoffshore. Collaborative and Enhanced First DetectorWorkshop. March 14th, Miami-Dade County Extension, Homestead, FL. Presentation. Palmateer, A.J. 2013. How to diagnose and manage common diseases and disorders affecting orchids. Jan 26, Tamiami Orchid Show, Miami, FL. Presentation. Palmateer, A.J. 2012. Plant disease management in the nursery and landscape. Commercial producers and landscapers symposium sponsored by BWI companies, Delray Beach, FL. Presentation. Palmateer, A.J. 2013. Recent outbreak of impatiens downy mildew in the United States. April 30th, Central Plant Board, Manhattan, KS. Palmateer, A.J. 2013. Impatiens downy mildew. Greater Plains Diagnostic Network Webinar Series. Presentation. Palmateer, A.J. 2012. Impatiens downy mildew: the Florida perspective. Ornamental Workshop on Diseases and Insects, Kanuga Conference Center, Hendersonville, NC. Presentation. Palmateer, A.J. 2013. Diagnostic techniques and diagnosis common diseases and disorders of tropical foliage. Animal and Plant Health Inspection Service Plant Protection and Quarantine. February, 1st, Plant Inspection Station, Miami, FL. What do you plan to do during the next reporting period to accomplish the goals? Continue to focus on the etiology of new diseases affecting economically important ornamentals in South Florida using new and improved diagnostic techniques. Continue to conduct trials using integrated measures for disease management.
Impacts
What was accomplished under these goals?
Five new diseases were diagnosed for the state of Florida and two for Puerto Rico. For each new disease the pathogen was characterized using morphological, cultural and molecular characteristics. A new diagnostic technique (High Fidelity PCR) that is more sensitive for pathogen detection in the presence of plant host tissue was developed and used to detect bacterial, fungal and viral plant pathogens. This technique has become routine for use in the diagnostic clinic and is currently being evaluated in other labs especially for detecting the laurel wilt pathogen in avocado.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2012
Citation:
Palmateer, A.J., T.L.B. Tarnowski, and P. Lopez. 2012. First report of Colletotrichum sansevieriae causing anthracnose on Sansevieria trifasciata in Florida. Plant Disease 96(2): 293.
- Type:
Journal Articles
Status:
Published
Year Published:
2012
Citation:
Cating, R.A., M.A. Hoy, and A.J. Palmateer. 2012. A comparison of standard and high-fidelity PCR: evaluating quantification and detection of pathogen DNA in the presence of orchid host tissue. Plant Disease 96(4): 480-485.
- Type:
Journal Articles
Status:
Published
Year Published:
2012
Citation:
Merritt, J.L., E. Dickstein, R.S. Johnson, M. Ward, R.J. Balaam, C.L. Harmon, P.F. Harmon, G.S. Ali, A.J. Palmateer, T. Schubert, and A.H.C. van Bruggen. 2012. Survey of ornamental nurseries in Florida participating in the U.S.-Canadian greenhouse certification program. HortTechnology 22(2): 169-176.
- Type:
Journal Articles
Status:
Published
Year Published:
2012
Citation:
Palmateer, A.J., R.A. Cating, P. Lopez, and I. Maguire. 2012. First report of Phytophthora palmivora causing foliar blight on Pachira aquatica in Florida. Plant Disease 96(9): 1375.
- Type:
Journal Articles
Status:
Published
Year Published:
2012
Citation:
Romero, G., C. Estevez de Jensen, and A.J. Palmateer. 2012. First report of Pythium dissotocum affecting cilantro in hydroponic systems in Puerto Rico. 2012. Plant Health Progress 14 December 2012. doi:10.1094/PHP-2012-1214-01-BR.
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Palmateer, A.J., T.E. Seijo, P. Lopez, and N.A. Peres. 2013. Severe outbreak of downy mildew caused by Plasmopara obducens on Impatiens walleriana in Florida. Plant Disease 97(5): 687. http://dx.doi.org/10.1094/PDIS-08-12-0705-PDN
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Romero, G., C. Estevez de Jensen, and A.J. Palmateer. 2013. First report of Tomato Wilt Caused by Ralstonia solanacearum in Puerto Rico. Plant Health Progress 1 February 2013. doi:10.1094/PHP-2013-0418-01-BR
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Gumtow, R.L., A.A. Khan, A.M. Bocsanczy, J.M.F. Yuen, A.J. Palmateer, and D.J. Norman. 2013. First report of a leaf spot disease of golden dewdrop (Duranta erecta) caused by Pseudomonas cichorii and a Xanthomonas species in Florida. Plant Disease 97(6): 836.
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Paret, M.L., A.J. Palmateer, and G.W. Knox. 2013. Evaluation of a light-activated nanoparticle formulation of Titanium Dioxide with Zinc for management of bacterial leaf spot on Rosa Noare. HortScience 48(2):189-192.
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Ploetz, R.C., A.J. Palmateer, P. Lopez, and M.C. Aime. 2013. First report of rust, caused by Puccinia nakanishikii, on lemongrass, Cymbopogan citratus, in Florida. Plant Disease 98(1):156.
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Dreaden, T.J., M. Davis, J.A. Smith, C.L. Harmon, R.C. Ploetz, A.J. Palmateer and P.S. Soltis. 2013. Development of real-time and traditional PCR assays for Raffaelea lauricola, causal agent of laurel wilt disease. Plant Disease 98(1):379-383.
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Progress 10/01/11 to 09/30/12
Outputs
OUTPUTS: Several state wide, national and international presentations were given on new and economically important diseases affecting ornamental crops. Nursery growers located throughout south FL were educated (programs in West Palm Beach, Broward & Miami Dade Counties) on the importance of using the diagnostic lab for obtaining reliable results as the initial step in a successful disease management program, especially during tough economic times. Results on diagnostic methods for pathogen detection and quantification and the effect of temperature on bacterial leaf spot of Phalaenopsis, caused by Acidovorax cattleyae. were presented to an international audience in Honolulu, HI and San Juan, Puerto Rico. A national audience in Charlotte, NC was educated on the differences of using high fidelity PCR and conventional PCR for detecting plant pathogens from host tissue. The occurrence of several new diseases affecting commercial orchid producers including a new bacterial soft rot disease on Oncidium orchids and severe outbreak of foliar blight (caused by a Bipolaris sp.) on Chinese spinach in commercial nurseries and landscapes throughout south FL. Results of factors influencing pathogen detection in plant host tissue were presented and discussed among an international audience in St Michaels, Barbados. A severe outbreak of Xanthomonas blight on Ficus elastica was observed in several nurseries throughout South Florida during summer of 2010. The causal agent was identified and disease management trials were conducted and results presented at extension workshops in Florida and at national professional meetings. Several species of Phytophthora have been reported to cause economic damage on orchids worldwide. Of these, P. cactorum and P. palmivora have the widest host range across orchid genera, and they are the most common species affecting commercial orchid production in Florida. A practical diagnostic treatment of economically important Phytophthora species affecting commercial orchid production was published in Plant Health Progress. The etiology of a disease affecting a new dooryard and commercially produced tropical crop, Hylocereus undatus was described and published. PARTICIPANTS: Aaron J. Palmateer- Principal investigator who overseen all projects, provided guidance for designing and evaluating experiments, conducted data analysis, published and presented results. Tara Tarnowski- Post doctoral research associate involved in setting up experiments, isolation and culture of pathogens, molecular diagnostic techniques, data collection, conducted data analysis, published and presented results. Ian Maguire- Biological Scientist who was involved in setting up experiments, data collection and field experiment maintenance. Ian participated in a plant disease diagnostic training held at The Pennsylvania State University. Patricia Lopez- laboratory technician involved in all lab experiments, isolation and culture of pathogens, molecular diagnostic techniques and data collection. Patricia participated in a molecular diagnostics and bioinformatics training held at APHIS/PPQ in Beltsville, MD. TARGET AUDIENCES: Clientele of the Florida Extension Plant Diagnostic Clinic, Homestead, FL are a primary target audience. The clinic receives approximately 1,000 plant samples per year. Diagnostic findings and disease management reports are provided to these individuals. Clientele include, commercial ornamental plant producers, landscape professionals, pest control companies, crop insurance companies, county extension agents, horticultural consultants and homeowners. Results were presented at county extension workshops held where target audiences include commercial producers, agricultural industry representatives, landscape professionals and pest control companies. Efforts for these workshops include digital presentations, fact sheets as handouts, and "hands on" activities such as plant disease specimens and microscopes to examine symptoms and signs of pathogens. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
Change in knowledge: A new soft rot disease of Oncidium orchids was described. Isolates of the causal bacterium grew at 86 degrees, were gram negative, produced brown pigment on NGM medium, and tested positive for pectolytic activity and phosphatase. MIDI Microbial Identification (16 System, Newark, DE) (SIM 0.732-0.963) identified the bacteria as Erwinia chrysanthemi (Dickeya chrysanthemi Burkholder) Samson et al. 2005. A PCR was performed on the 16S rRNA gene and Subsequent DNA sequencing and GenBank search showed the isolated strain is 99% identical to that of Dickeya chrysanthemi. Pathogenicity was confirmed by fulfilling Koch's postulates. Change in knowledge: A first report of Xanthomonas affecting F. elastica was reported. Koch's postulates were conducted that proved pathogenicity of the bacterium. Molecular characterization was conducted and the resulting band obtained from PCR with degenerate primers for 16rDNA was sent to be sequenced and the sequence results were blasted in GenBank. The sequence exhibited 99% nucleotide identity to an isolate of X. axonopodis (GenBank accession No. AF123091) collected from diseased tomato leaves in Florida. Initial experiments evaluating the impact of light and temperature on disease development and examining host range of the pathogen, specifically other popular foliage plants that are produced under the same conditions in close proximity to F. elastica, are currently underway. Change in knowledge: Bacterial leaf spot of orchid, caused by Acidovorax cattleyae, is common in south Florida nurseries. Little is known about the epidemiology of the disease. The effect of temperature on bacterial leaf spot of Phalaenopsis orchids caused by Acidovorax cattleyae was investigated in growth chamber experiments. Results indicate that the incidence and severity of disease increases with temperature and that the most favorable temperature for disease ranges from 86 to 92 degrees. Growers have responded by applying preventative pesticide treatments during early to mid July for cost effective disease management. Change in knowledge: A practical diagnostic resource for black rot on orchids caused by Phytophthora palmivora and P. cactorum was published. This research examined the causal agents of this disease, current taxonomy, symptoms and signs of the disease, host range within the Orchidaceae, geographic distribution, pathogen isolation techniques, pathogen identification, molecular diagnostics, pathogen storage and pathogenicity tests for isolates of Phytophthora obtained from diseased orchids in Florida. Change in Knowledge: A first report of fruit rot on Hylocereus undatus caused by Bipolaris cactivora in south Florida was reported. Koch's postulates were conducted that proved pathogenicity. Symptoms of the disease were described and a morphological and molecular characterization of the pathogen determined. ITS (GenBank Accession Nox. HM598677-79) sequences aligned most closely (99.7% homology) with another B. cactivora isolate from China (GU390882), and both ITS and gpd (GenBank Accession Nos. HM598680-82) sequences indicate a close relationship to Bipolaris indica.
Publications
- Campoverde, E.V. and A.J. Palmateer. 2011. A severe outbreak of Xanthomonas on Ficus elastica in South Florida. Proceedings of the Florida State Horticultural Society (in press).
- Campoverde, E.V. and A.J. Palmateer. 2011. Xanthomonas leaf blight of Ficus elastica. Annual meeting of the American Phytopathological Society, Honolulu, HI. Phytopathology 101:S26.
- Campoverde, E.V. and A.J. Palmateer. 2011. A sensitive molecular method for detecting virus in orchids. Annual meeting of the American Phytopathological Society, Honolulu, HI. Phytopathology 101:S26.
- Cating, R.A. and A.J. Palmateer. 2011. Occurrence of a soft-rot disease on Oncidium orchids caused by a Dickeya sp. in Florida. Annual meeting of the American Phytopathological Society, Honolulu, HI. Phytopathology 101:S29.
- Cating, R.A., A.J. Palmateer, C.M. Stiles, and P.A. Rayside. 2010. Black Rot of Orchids Caused by Phytophthora cactorum and Phytophthora palmivora in Florida. Plant Health Progress 14 June 2010. DOI:10.1094/PHP-2010-0614-01-DG
- Palmateer, A.J., R.A. Cating, T.L.B. Tarnowski, P. Lopez, E.V. Campoverde, and C. Estevez de Jensen. 2011. Improved disease diagnosis: development of a novel molecular technique for the detection and identification of plant pathogens in host tissue. Proceedings of the Caribbean Food Crop Society p. 37-44.
- Palmateer, A.J., R.A. Cating, and T.L.B. Tarnowski. 2011. A tool for detecting plant pathogens from host tissue. 21st Annual Meeting Caribbean Division of the American Phytopathological Society, San Juan, Puerto Rico.
- Palmateer, A.J., R.A. Cating, T.L.B. Tarnowski, P. Lopez, E.V. Campoverde, and C. Estevez de Jensen. 2011. Improved disease diagnosis: development of a novel molecular technique for the detection and identification of plant pathogens in host tissue. 47th Annual Meeting of the Caribbean Food Crops Society, St Michael, Barbados.
- Palmateer, A.J., P.F. Harmon, A.C. Hodges, C.L. Harmon, C. Mannion, S. Zhang, M.L. Elliott, N.A. Peres, G. Vallad, L. Buss, M.L. Paret, and J.A. Smith. 2011. Achievements of the Florida Plant Diagnostic Network 2009-2011. 3rd Annual Meeting of the National Plant Diagnostic Network, Berkeley, CA.
- Romero, G., C. Estevez de Jensen y A.J. Palmateer. 2011. Identificacion de Ralstonia solanacearum, agente causal de la marchitez bacteriana del tomate, en algunas localidades de Puerto Rico. Memorias de la Sociedad de Cientificos de Ciencias Agricolas SOPCA, Ponce, Puerto Rico. Nov. 18, p. 14.
- Zhang, S., Y.Fu, Z. Mersha, X. Mo, and A.J. Palmateer. 2011. First report of a leaf spot on Basella alba caused by a Bipolaris sp. in Florida. Plant Disease 95(7): 880. olume 93, Number 2: 199.
- Romero, G., C. Estevez de Jensen, and A.J. Palmateer. 2011. Detection of citrus greening with high-fidelity PCR. 21st Annual Meeting Caribbean Division of the American Phytopathological Society, San Juan, Puerto Rico.
- Tarnowski, T.L., A.J. Palmateer, and R.T. McMillan. 2011. Effect of temperature on bacterial leaf spot of Phalaenopsis, caused by Acidovorax cattleyae. Annual meeting of the American Phytopathological Society, Honolulu, HI. Phytopathology 101:S175.
- Tarnowski, T.L.B., A.J. Palmateer, I. Maguire, and J.H. Crane. 2011. Fruit rot on Hylocereus undatus caused by Bipolaris cactivora in South Florida. 47th Annual Meeting of the Caribbean Food Crops Society, St Michael, Barbados.
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Progress 05/30/09 to 12/30/09
Outputs
OUTPUTS: Several state wide and national presentations were given on new and economically important diseases affecting ornamental crops. Nursery growers located throughout south FL were educated (programs in West Palm Beach County & Miami Dade County) on the importance of using the diagnostic lab for obtaining reliable results as the initial step in a successful disease management program, especially during tough economic times. Results on culture methods for growth and sporulation of Pseudocercospora dendrobii, P. odontoglossi, and an undescribed Pseudocercospora sp. from Bulbophyllum orchids were presented to a national mycological audience in Snowbird UT. A national audience in Portland, OR was educated on the occurrence of several new diseases affecting commercial orchid producers including a new bacterial soft rot disease on Tolumnia orchids and severe outbreak of southern blight (caused by Sclerotium rolfsii) on Vanda orchids in commercial nurseries and landscapes throughout south FL. It was also presented that the latter disease was found on new orchid hosts including several Ascocentrum and Ascocenda orchid hybrids. Results of factors influencing the development of Neofusicoccum parvum induced dieback of Syzygium paniculatum were presented and discussed at an international meeting in St. Kitts and Nevis. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: Not relevant to this project.
Impacts
Change in knowledge: A new soft rot disease of Tolumnia orchid species was described. Isolates of the causal agent grew at 37 C, were gram negative, produced brown pigment on NGM medium, and tested positive for pectolytic activity and phosphatase. MIDI (SIM 0.732-0.963) identified the bacteria as Erwinia chrysanthemi (Dickeya chrysanthemi Burkholder et al. 1953) Samson et al. 2005. A PCR was performed on the 16S rRNA gene and Subsequent DNA sequencing and GenBank search showed the isolated strain is 99% identical to that of Dickeya chrysanthemi. Pathogenicity was confirmed by fulfilling Koch's postulates. A new report of southern blight was documented on several Ascocentrum and Ascocenda orchid hybrids. The disease caused these orchids to become severely wilted at the apex, and tan, soft, water-soaked lesions developed on basal portions of the plants. As the lesions progressed, basal leaves began to drop, leaving the stems bare. After two days, white, flabellate mycelium was seen progressing up the stem with numerous tan to brown sclerotia present. The fungus was identified as Sclerotium rolfsii and a voucher specimen deposited with the ATCC. A PCR was performed on the ITS1, 5.8S rDNA, and ITS2 and the sequence was deposited in GenBank. Pathogenicity of an isolate was confirmed by fulfilling Koch's postulates. Most cercosporoid fungi require special media, light, and temperature requirements for growth and spore production in culture. A suitable medium and favorable conditions for the growth and development of several orchid pathogens including P. dendrobii, P. odontoglossi, and an undescribed Pseudocercospora sp. from Bulbophyllum orchids were described. These findings will allow researchers to adequately grow these pathogens in artificial culture, thus providing a means to conduct pathogenicity and host-range studies, morphological studies, and phylogenetic analysis based on molecular data. Neofusicoccum parvum caused a lethal dieback of Syzygium paniculatum in Florida. Disease development was reduced at low temperatures (15 and 20 C vs 25 and 30 C), but isolate and light intensity had minimal impact. Downy mildew on basil (Ocimum basilicum) was detected from four production sites (Collier, Hendry, Miami-Dade, and Palm Beach counties) in south Florida, and within months, it was also found in west-central north Florida (Hillsborough County). Incidence reached nearly 100% on some of the affected crops and caused complete yield losses on basil grown for fresh market and potted herbs. Morphological and sequence data matched (100% homology) with a Peronospora sp. previously reported on sweet basil in Switzerland and was similar (99% homology) to an isolate reported on coleus, although inoculation to coleus failed to confirm pathogenicity on basil. The sequence data also distinguished the isolate from P. lamii (87% homology) previously reported to occur on basil. The pathogen was identified as a Peronospora sp. based on morphological characteristics and sequencing homology
Publications
- First Report of a Bacterial Soft Rot on Tolumnia Orchids Caused by a Dickeya sp. in the United States R. A. Cating, A. J. Palmateer, R. T. McMillan, and E. R. Dickstein Plant Disease Dec 2009, Volume 93, Number 12: 1354.
- First Report of Sclerotium rolfsii on Ascocentrum and Ascocenda Orchids in Florida R. A. Cating, A. J. Palmateer, and R. T. McMillan, Jr. Plant Disease Sep 2009, Volume 93, Number 9: 963.
- Culture methods for growth and sporulation of Pseudocercospora dendrobii, P. odontoglossi, and an undescribed Pseudocercospora sp. from Bulbophyllum orchids. R. A. Cating, A. J. Palmateer, and M. A. Hoy. 2009 MSA Annual Meeting P2EP058:928
- A National Plant Disease Recovery Plan for laurel wilt of avocado R. PLOETZ, G. Bender, R. Bostock, R. Bulluck, J. Crane, M. Draper, A. Eskalen, G. Evans, B. Faber, S. Fraedrich, J. Hanula, C. Harmon, T. Harrington, A. Palmateer, J. Pena, R. Schnell, J. Smith, K. Smith, M. Wingfield 2009 Phytopathology 99:S102
- Occurrence of Dickeya chrysanthemi (Erwinia chrysanthemi) on Tolumnia orchids in Florida R. A. Cating, A. J. Palmateer, R. T. MCMILLAN, E. R. Dickstein 2009 Phytopathology 99:S19
- Occurrence of Sclerotium rolfsii on Ascocentrum and Ascocenda orchids in Florida R. A. Cating, A. J. PALMATEER, R. T. McMillan 2009 Phytopathology 99:S19
- Influence of Temperature, Light Intensity, and Isolate on the Development of Neofusicoccum parvum Induced Dieback of Eugenia, Syzygium paniculatum Randy C. Ploetz, Jose M. Perez-Martinez, Aaron J. Palmateer, and Tara L. Tarnowski Plant Disease Aug 2009, Volume 93, Number 8: 804-808.
- First Report of Downy Mildew Caused by a Peronospora sp. on Basil in Florida and the United States P. D. Roberts, R. N. Raid, P. F. Harmon, S. A. Jordan, and A. J. Palmateer Plant Disease Feb 2009, Volume 93, Number 2: 199.
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