Publications by authors named "R B Bassanezi"
Management of Huanglongbing of Citrus: Lessons from São Paulo and Florida.
Annu Rev Phytopathol
September 2024
São Paulo, Brazil, and Florida, USA, were the two major orange production areas in the world until Huanglongbing (HLB) was discovered in São Paulo in 2004 and Florida in 2005. In the absence of resistant citrus varieties, HLB is the most destructive citrus disease known because of the lack of effective tools to reduce spread of the vector, (Asian citrus psyllid), and transmission of the associated pathogen, Liberibacter asiaticus. In both countries, a three-pronged management approach was recommended and begun: planting only disease-free nursery trees, effective psyllid control, and removal of all symptomatic trees.
View Article and Find Full Text PDFOne strategy to reduce huanglongbing (HLB) is controlling its insect vector, the Asian citrus psyllid (ACP) by preventive insecticide sprays. The recommendation is to spray insecticide in all rows (conventional spray [CONV]), but some growers empirically spray in alternate rows (ALT) to increase the spray frequency without increasing the operating cost. Therefore, this work compared the effect of ALT with CONV on the ACP population and HLB incidence.
View Article and Find Full Text PDFArticle Synopsis
- Citrus leprosis, a serious viral disease in citrus caused mainly by CiLV-C, is spread by the Brevipalpus yothersi mites, which are studied for their colonization behaviors on citrus plants.
- Previous infestations of these mites, whether virulent or not, increase mite populations through enhanced oviposition and adult numbers, showing that the plant's defensive gene expressions (PR1 and PR4) react differently based on the mites' virulence.
- The presence of leprosis lesions and artificial shelters supports mite growth, with the non-viruliferous mites boosting the jasmonic acid (JA) defense pathway, while viruliferous mites activate the salicy
Huanglongbing (HLB) is one of the most devastating citrus diseases worldwide. It is associated with the non-culture bacteria Liberibacter spp., which can be transmitted by grafting and/or the psyllid vectors (ACP) and (AfCP).
View Article and Find Full Text PDFIntroduction: The severe Asian form of huanglongbing (HLB), a vascular disease associated with the phloem-limited bacterium ' Liberibacter asiaticus', is transmitted by the Asian citrus psyllid (ACP) . Disease impacts are known for sweet oranges and acid limes but not lemons.
Methods: In a five-year study (2017-2021) we compared yield and fruit quality between naturally-infected and healthy 5-yr-old trees of Sicilian lemon 'Femminello', and shoot phenology on both lemon and 'Valencia' orange, both grafted onto 'Swingle' citrumelo, grown in southeastern São Paulo State, Brazil.