Data/hora: 14/06/2024 04:44:24

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 07/12/2009
Data da última atualização: | 31/03/2010
Autoria: | BASSANEZI, R. B.; MONTESINO, L. H.; STUCHI, E. S.
Afiliação: | Renato Beozzo Bassanezi, FUNDECITRUS; Luiz Henrique Montesino, FUNDECITRUS; EDUARDO SANCHES STUCHI, CNPMF.
Título: | Effects of huanglongbing on fruit quality of sweet orange cultivars in Brazil.
Ano de publicação: | 2009
Fonte/Imprenta: | European Journal of Plant Pathology, [Dordrecht-Holanda], v. 125, n. 4, p. 565-572, dec. 2009.
ISSN: | 0929-1873
DOI: | DOI 10.1007/s10658-009-9506-3
Idioma: | Inglês
Notas: | DOI 10.1007/s10658-009-9506-3
Conteúdo: | Citrus huanglongbing (HLB), associated with Candidatus Liberibacter asiaticus and Ca. L. americanus and transmitted by the Asian psyllid Diaphorina citri, is the most serious disease of citrus worldwide because of crop devastation and difficulty to control. Since 2004, approximately 3 million trees were eliminated in attempts to limit its spread in Brazil. Where HLB becomes endemic, the disease progression in the orchard and the increasing symptom severity throughout the tree canopy can be relatively fast, greatly reducing the economic life of affected orchards because of tree decline and yield reduction. Although the majority of the fruit from symptomatic branches drop before harvest, a significant amount of affected fruit remain attached, are available for harvest, and can affect juice quality. To quantify and compare the effects of HLB on fruit quality of the most important sweet orange cultivars grown in São Paulo State, 4-6 year-old sweet orange trees from 26 blocks (two of ?Valencia Americana?, eight of ?Hamlin?, four of ?Westin?, seven of ?Pera?, and five of ?Valencia?) were selected prior to harvest. In each block, 14-21 HLB-symptomatic trees were chosen. In each tree, the quality of 20 fruit normal in appearance from asymptomatic branches and 20 symptomatic fruit from symptomatic branches were assessed. In general, compared to normal fruit, the symptomatic fruit were small, light, more acidic, and had lower juice percentage, Brix, total soluble solids per box, total soluble solids per fruit, and Brix/acidity ratio. These effects of fruit quality were less pronounced on early and mid season sweet orange cultivars than on late season cv. Valencia.
Palavras-Chave: | Citrus greening; Crop loss.
Thesagro: | Citrus Sinensis; Doença de Planta; Fruta Cítrica.
Thesaurus Nal: | epidemiology.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (26319-1) - UPC - SP - PP - S12812 -  - 12812 - PCT