Agronomy and Crop Science


Publications
763

Zebra Chip Disease and Potato Biochemistry: Tuber Physiological Changes in Response to ‘Candidatus Liberibacter solanacearum’ Infection Over Time

Citation
Rashed et al. (2013). Phytopathology® 103 (5)
Names
“Liberibacter solanacearum”
Abstract
Zebra chip disease, putatively caused by the bacterium ‘Candidatus Liberibacter solanacearum’, is of increasing concern to potato production in Mexico, the United States, and New Zealand. However, little is known about the etiology of this disease and changes that occur within host tubers that result in its symptoms. Previous studies found that increased levels of phenolics, amino acids, defense proteins, and carbohydrates in ‘Ca. L. solanacearum’-infected tubers are associated with symptoms of

‘Candidatus Phytoplasma brasiliense’ (16SrXV-A Subgroup) Associated with Cauliflower Displaying Stunt Symptoms in Brazil

Citation
Canale, Bedendo (2013). Plant Disease 97 (3)
Names
Ca. Phytoplasma brasiliense
Abstract
Cauliflower stunt, caused by a phytoplasma of the group 16SrIII-J, was reported in the beginning of 2012 and has occurred with high incidences of infected plants (up to 90%) in crops located in the state of São Paulo in the southeast region of Brazil (3). Diseased plants exhibit general stunting, malformation of inflorescence, reddening leaves, and vessel necrosis (3). Further investigations with plants displaying identical symptoms collected in Nova Bassano, state of Rio Grande do Sul, Brazili

First Report of Candidatus Liberibacter asiaticus Associated with Citrus Huanglongbing in California

Citation
Kumagai et al. (2013). Plant Disease 97 (2)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB), also known as citrus greening, is one of the most destructive citrus diseases worldwide and is seen as a major threat to the multimillion dollar citrus industry in California. The vector of the two bacterial species associated with this disease, Candidatus Liberibacter asiaticus and Ca. L. americanus, is the Asian citrus psyllid (ACP), Diaphorina citri (4). ACP was detected in California in August of 2008 and has since been detected in nine counties in southern California.

First Report of Candidatus Phytoplasma solani on Blackberry (Rubus fruticosus) in Bulgaria

Citation
Bobev et al. (2013). Plant Disease 97 (2)
Names
Ca. Phytoplasma solani
Abstract
While performing a routine field survey on 2-year-old canes of Rubus fruticosus (cv. Evergreen Thornless) in the region of Plovdiv (central southern Bulgaria), severe stunting of single or grouped plants (3 to 4 in a row) was found in late August of 2009. It was noteworthy that the leaves of these plants were curved upwards and stayed green until the end of the season. The bushy aspect of the diseased plants led to the assumption of a phytoplasma origin; therefore, specific PCR and sequence bas

Heat Treatment Eliminates ‘Candidatus Liberibacter asiaticus’ from Infected Citrus Trees Under Controlled Conditions

Citation
Hoffman et al. (2013). Phytopathology® 103 (1)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) is one of the most destructive diseases of citrus worldwide. The three known causal agents of HLB are species of α-proteobacteria: ‘Candidatus Liberibacter asiaticus’, ‘Ca. L. africanus’, and ‘Ca. L. americanus’. Previous studies have found distinct variations in temperature sensitivity and tolerance among these species. Here, we describe the use of controlled heat treatments to cure HLB caused by ‘Ca. L. asiaticus’, the most prevalent and heat-tolerant species. Using temper