Plant Health Progress


Publications
5

Recovery Plan for X-Disease in Stone Fruit Caused by ‘Candidatus Phytoplasma pruni’

Citation
Harper et al. (2023). Plant Health Progress
Names
Ca. Phytoplasma pruni
Abstract
Stone fruits are a multibillion-dollar industry for the United States and Canada, one that has repeatedly suffered significant economic losses due to outbreaks of the X-disease phytoplasma (‘ Candidatus Phytoplasma pruni’) over the last century. Orchards and entire production areas have been abandoned, with corresponding losses to growers, fruit packers, and consumers. The most recent outbreak, in the U.S. Pacific Northwest, resulted in an estimated $65 million (USD) loss in revenue between 201

First Report of ‘Candidatus Phytoplasma brasiliense’ in North America and in a New Host, Globe Sedge (Cyperus globulosus)

Citation
Di Lella et al. (2022). Plant Health Progress
Names
Ca. Phytoplasma brasiliense
Abstract
A survey of weeds was undertaken in a palm nursery affected by lethal bronzing (LB) to identify a reservoir host of the causal phytoplasma. Three common species were identified; Urochloa maxima (Guineagrass), Sporobolus indicus (smut grass), and Cyperus esculentus (yellow nutsedge) and sampled over a period of 2 years. Each species was sampled 36 times and all three species were negative for the LB phytoplasma. However, three specimens of C. esculentus tested positive for the phytoplasma specie

Huanglongbing, Caused by ‘Candidatus Liberibacter asiaticus,’ Detected in New Locations Across Southern and Coastal Georgia

Citation
Oliver et al. (2020). Plant Health Progress 21 (1)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) or citrus greening disease is the most devastating disease of citrus worldwide. This disease, caused by the bacterium ‘Candidatus Liberibacter asiaticus’ (CLas), leads to low fruit quality and unproductive trees. In 2008, HLB was found in a residential citrus tree in Savannah, Georgia, and, as a result, the state has been quarantined for this disease since 2009. Nonetheless, little is known about the distribution of CLas within Georgia, even though the commercial planting of

Survey and Detection of ‘Candidatus Liberibacter asiaticus’ in a Citrus Nursery Facility in South Texas

Citation
Alabi et al. (2014). Plant Health Progress 15 (4)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) disease, associated with ‘Candidatus Liberibacter asiaticus’ (CLas), is primarily spread via infected citrus nursery trees and by infective Asian citrus psyllid, the insect vector. Recently, the Texas Department of Agriculture initiated regulations requiring commercial and retail citrus nurseries in Texas to transition from traditional open-field to enclosed facilities with insect-resistant screens to mitigate the risk of nurseries serving as sources of CLas. Although severa

Detection of Candidatus Liberibacter asiaticus from Wampee (Clausena lansium Skeels) by Nested PCR

Citation
Deng et al. (2007). Plant Health Progress 8 (1)
Names
Ca. Liberibacter asiaticus
Abstract
Wampee (Clausena lansium Skeels) is native to southern China and Southeast Asia. Wampee trees are attractive, with grape-like fruits and a muscat taste and are popular in home gardens. Like other members of Rutaceae, wampee has long been suspected to have yellow shoot disease or Huanglongbing (HLB) and Diaphorina citri, the disease vector, was capable of a long-term survival on Wampee. The authors recommend that eradication of wampee trees surrounding citrus orchards should be part of the overa