Plant Science


Publications
816

First Report of ‘Candidatus Phytoplasma australiense’ in Potato

Citation
Liefting et al. (2009). Plant Disease 93 (9)
Names
Ca. Phytoplasma australiense
Abstract
In January of 2009, potato plants (Solanum tuberosum) from a commercial crop in the Waikato Region, New Zealand were observed to have symptoms of upward rolling and purpling of the leaves. The symptoms appeared similar to those of “zebra chip”, a disorder of potato recently found to be associated with ‘Candidatus Liberibacter solanacearum’ in New Zealand and the United States (4). Total DNA from the leaf midveins and tubers from one of the symptomatic plants was separately extracted with an Inv

Association of ‘Candidatus Liberibacter solanacearum’ with Zebra Chip Disease of Potato Established by Graft and Psyllid Transmission, Electron Microscopy, and PCR

Citation
Secor et al. (2009). Plant Disease 93 (6)
Names
“Liberibacter solanacearum”
Abstract
A new disease of potatoes, tentatively named zebra chip (ZC) because of the intermittent dark and light symptom pattern in affected tubers which is enhanced by frying, was first found in Mexico in 1994 and in the southwestern United States in 2000. The disease can cause severe economic losses in all market classes of potatoes. The cause of ZC has been elusive, and only recently has been associated with ‘Candidatus Liberibacter’ sp. Field samples of potato plants were collected from several loca

First Report of Aster Yellow Phytoplasmas (‘Candidatus Phytoplasma asteris’) in Canadian Grapevines

Citation
Olivier et al. (2009). Plant Disease 93 (6)
Names
Ca. Phytoplasma asteris
Abstract
In North America, elm yellows, aster yellows (AY), and X-disease phytoplasmas have been detected in American grapevines (1), and recently, Bois noir was detected in Canadian vineyards from British Columbia (BC) and Ontario (ON) (2). Typical symptoms of grapevine yellows (GY) include leaf rolling and chlorosis, uneven or total lack of lignification of canes, flower abortion or berry withering, and stunting. In 2006 and 2007, independent surveys were conducted by the Canadian Food Inspection Agen

First Report of ‘Candidatus Liberibacter asiaticus’ Associated with Citrus Huanglongbing in the Dominican Republic

Citation
Matos et al. (2009). Plant Disease 93 (6)
Names
Ca. Liberibacter asiaticus
Abstract
In August 2008, unusual symptoms were observed in Mexican lime trees (Citrus aurantifolia (Christm.) Swing) in the municipality of Luperón, province of Puerto Plata on the north coast of the Dominican Republic. Symptoms observed in young and old trees included blotchy mottle on leaves, healthy-appearing larger branches with smaller side branches that displayed chlorotic leaves, abscised and lopsided fruit, and branch dieback, all symptoms similar to those of citrus huanglongbing associated with

Detection and Molecular Characterization of a ‘Candidatus Phytoplasma asteris’-Related Strain Infecting Sasa fortunei in China

Citation
Zhang et al. (2009). Plant Disease 93 (5)
Names
Ca. Phytoplasma asteris
Abstract
Bamboos are ecologically and economically valuable plants. Young shoots of almost all species are edible, either raw or cooked, and are major components of Asian cuisine while culms are used for furniture or handicrafts as well as fuel wood. Symptoms indicative of phytoplasma disease were observed on Sasa fortunei (van Houtte) Fiori during a survey in Yangling, Shaanxi Province, China during 2007. Symptoms included internode shortening, a mosaic pattern on leaves of diminished size, stunted gro

First Report of ‘Candidatus Liberibacter psyllaurous’ in Zebra Chip Symptomatic Potatoes from California

Citation
Crosslin, Bester (2009). Plant Disease 93 (5)
Names
Ca. Liberibacter psyllaurous
Abstract
A disease that severely affects processing potatoes (Solanum tuberosum L.), termed zebra chip (ZC), has been identified in several locations in the United States (Texas, Nebraska, Colorado, Kansas, New Mexico, Arizona, and Nevada), Mexico, and Central America (4). The disease name comes from the rapid oxidative darkening of freshly cut tubers and the dark stripes and blotches that occur in chips processed from infected tubers. Recently, the disorder has been associated with a new ‘Candidatus Li

First Report of ‘Candidatus Liberibacter psyllaurous’ in Potato Tubers with Zebra Chip Disease in Mexico

Citation
Munyaneza et al. (2009). Plant Disease 93 (5)
Names
Ca. Liberibacter psyllaurous
Abstract
Zebra Chip (ZC), an emerging disease of potato (Solanum tuberosum L.) first documented in potato fields around Saltillo in México in 1994, has been identified in the southwestern United States, México, and Central America and is causing losses of millions of dollars to the potato industry (4). Recently, this damaging potato disease was also documented in New Zealand (3). This disease is characterized by a striped pattern of necrosis in tubers produced on infected plants, and fried chips process

A Phytoplasma Related to ‘Candidatus Phytoplasma asteris’ Detected in Citrus Showing Huanglongbing (Yellow Shoot Disease) Symptoms in Guangdong, P. R. China

Citation
Chen et al. (2009). Phytopathology® 99 (3)
Names
Ca. Phytoplasma asteris
Abstract
Citrus huanglongbing (HLB) or yellow shoot disease (i.e., greening disease) is highly destructive to citrus production worldwide. Understanding the etiology of HLB is critical for managing the disease. HLB is currently associated with infection by ‘Candidatus Liberibacter spp.’ around the world, including China. However, Koch's postulates have not been fulfilled. In addition, other plant pathogens also may be involved in HLB. In a survey performed in Guangdong Province, P. R. China in 2006 and