Diagrammatic scale for blister spot in leaves of coffee tree

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorFreitas, Marcelo Loran de Oliveira-
Autor(es): dc.creatorPozza, Edson Ampélio-
Autor(es): dc.creatorBelan, Leônidas Leoni-
Autor(es): dc.creatorSilva, Jhonata Lemos da-
Autor(es): dc.creatorAbreu, Mario Sobral de-
Data de aceite: dc.date.accessioned2026-02-09T11:24:21Z-
Data de disponibilização: dc.date.available2026-02-09T11:24:21Z-
Data de envio: dc.date.issued2018-01-04-
Data de envio: dc.date.issued2018-01-04-
Data de envio: dc.date.issued2015-05-07-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/28345-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1140134-
Descrição: dc.descriptionBlister Spot is a disease transmitted through seeds. This characteristic of the disease reveals the studies of severity can offer more replies than the studies of incidence. Due to the inexistence of standardized for visual quantification of the Blister Spot’s severity, the aim of this work was to build up and validate a diagrammatic scale for evaluating the severity of Blister Spot in coffee tree. Leaves in the field were collected with different intensities of symptoms disease, and electronically determined the real severity. Based on the frequency distribution of the severity values, and according to the law of visual stimulus of Weber-Fechner, the maximum and minimum limits, and the intermediate levels of the scale were defined. The validation was realized by eight evaluators that estimated the severity in 50 leaves with different intensities of symptoms. An evaluation without the aid of the diagrammatic scale was realized, and two others with its use, having intervals of seven days. The accuracy, precision, repeatability and reproducibility of the estimate were evaluated. The developed scale shows seven 0 (0%), 1 (0.1-3%), 2 (3.1-6%), 3 (6.1-12%), 4 (12.1-25%) and5 (≥25.1%). Using the scale proposed, the evaluators presented better levels of accurancy, precision, reproducibility and repeatability in the estimate, once compared to the evaluators who did not use the diagrammatic scale. The diagrammatic scale was adjusted to aid in the visual estimate of the severity of the Blister Spot in coffee leaves.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Publicador: dc.publisherAcademic Journals-
Direitos: dc.rightsAttribution 4.0 International-
Direitos: dc.rightsAttribution 4.0 International-
Direitos: dc.rightsacesso aberto-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
???dc.source???: dc.sourceAfrican Journal of Agricultural Research-
Palavras-chave: dc.subjectCoffee – Diseases and pests-
Palavras-chave: dc.subjectCoffee – Blister spot-
Palavras-chave: dc.subjectPhytopathogenic fungi-
Palavras-chave: dc.subjectCafé – Doenças e pragas-
Palavras-chave: dc.subjectCafé – Mancha manteigosa-
Palavras-chave: dc.subjectFungos fitopatogênicos-
Palavras-chave: dc.subjectCoffea arabica-
Palavras-chave: dc.subjectColletotrichum gloeosporioides-
Título: dc.titleDiagrammatic scale for blister spot in leaves of coffee tree-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

Não existem arquivos associados a este item.