Agronomy and Crop Science


Publications
763

First Report of a Huanglongbing-Like Disease of Citrus in Sao Paulo State, Brazil and Association of a New Liberibacter Species, “Candidatus Liberibacter americanus”, with the Disease

Citation
Texeira et al. (2005). Plant Disease 89 (1)
Names
Ca. Liberibacter americanus
Abstract
Huanglongbing (HLB) (ex-greening) is one of the most serious diseases of citrus. The causal agent is a noncultured, sieve tube-restricted α-proteobacterium, “Candidatus Liberibacter africanus” in Africa and “Candidatus Liberibacter asiaticus” in Asia (2). The disease has never been reported from the American continent. However, Diaphorina citri, the Asian psyllid vector of HLB, is found in South, Central, and North America (Florida and Texas). Early in 2004, leaf and fruit symptoms resembling t

First Report of the Causal Agent of Huanglongbing (“Candidatus Liberibacter asiaticus”) in Brazil

Citation
Coletta-Filho et al. (2004). Plant Disease 88 (12)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (ex-greening) disease is one of the most serious diseases of citrus. It is caused by the phloem-limited, gram-negative bacterium “Candidatus Liberibacter spp.”. This bacterium is not well characterized mainly because it is still uncultured. There are two known strains, Asian (“Candidatus Liberibacter asiaticus”) and African (“Candidatus Liberibacter africanus”) that cause severe damage to citrus plants including twig dieback, decline, and death. Symptoms first appear as leaf mottl

First Report of “Candidatus Liberibacter asiaticus”, the Agent of Citrus Huanglongbing (Ex-greening) in Bhutan

Citation
Doe et al. (2003). Plant Disease 87 (4)
Names
Ca. Liberibacter asiaticus
Abstract
Mandarin (Citrus reticulata) is the most important cash crop in Bhutan and plantations total approximately 1.8 million trees (Ministry of Agriculture, Thimphu, Bhutan, 2000). Most trees are a local mandarin variety. Seedlings trees are produced by local farmers or supplied by Druk Seed Nursery. Mandarin seedlings have also been introduced from India. In the mid-1990s, mandarin trees growing in Punakha Valley and Wangdue districts began showing symptoms of decline that included sparse yellow fol