Lopes, S. A.


Publications
5

‘Candidatus Liberibacter asiaticus’ Titers in Citrus and Acquisition Rates by Diaphorina citri Are Decreased by Higher Temperature

Citation
Lopes et al. (2013). Plant Disease 97 (12)
Names
Ca. Liberibacter asiaticus
Abstract
‘Candidatus Liberibacter asiaticus’ is the most prevalent Liberibacter sp. associated with huanglongbing (HLB) in Brazil. Within São Paulo state (SP), HLB has spread more rapidly to and reached higher incidence in regions with relatively mild (cooler) summer temperatures. This suggests that climate can influence disease spread and severity. ‘Ca. L. asiaticus’ titers on soft, immature leaves from infected ‘Valencia’ sweet orange plants exposed to different temperature regimes and adult Diaphorin

Graft Transmission Efficiencies and Multiplication of ‘Candidatus Liberibacter americanus’ and ‘Ca. Liberibacter asiaticus’ in Citrus Plants

Citation
Lopes et al. (2009). Phytopathology® 99 (3)
Names
Ca. Liberibacter asiaticus Ca. Liberibacter americanus
Abstract
In Brazil ‘Candidatus Liberibacter asiaticus’ and ‘Ca. L. americanus’ cause huanglongbing (also known as greening), the most destructive citrus disease. A shift in pathogen prevalence was observed over time, with a disproportional increase in ‘Ca. L. asiaticus’ occurrence. Graft transmission experiments were used for a comparative study of both species using budsticks from symptomatic branches of field-affected trees as inoculum. The plants were inoculated with ‘Ca. L. asiaticus’ or ‘Ca. L. ame

Liberibacters Associated with Citrus Huanglongbing in Brazil: ‘Candidatus Liberibacter asiaticus’ Is Heat Tolerant, ‘Ca. L. americanus’ Is Heat Sensitive

Citation
Lopes et al. (2009). Plant Disease 93 (3)
Names
Ca. Liberibacter asiaticus
Abstract
In São Paulo State, Brazil, ‘Candidatus Liberibacter americanus’ and ‘Candidatus Liberibacter asiaticus’ are associated with huanglongbing (HLB). Affected municipalities occur mainly in the central and southern regions, where the annual number of hours above 30°C is two to five times lower than that in the extreme northern and western regions. The influence of temperature on sweet orange trees infected with ‘Ca. L. asiaticus’ or ‘Ca. L. americanus’ was studied in temperature-controlled growth c

Graft Transmission and Cultivar Reaction of Citrus to ‘Candidatus Liberibacter americanus’

Citation
Lopes, Frare (2008). Plant Disease 92 (1)
Names
Ca. Liberibacter americanus
Abstract
Little is known about ‘Candidatus Liberibacter americanus’, a causal agent of huanglongbing or greening disease in Brazil, or its interaction with citrus trees. Greenhouse experiments were conducted with the objective of determining conditions favorable for transmission from field affected trees to young potted plants, to evaluate the reaction of multiple citrus species to the disease, and to determine the efficiency of pathogen propagation from individual buds. Single buds or bark pieces of va