Comparison of three diagrammatic keys for the quantification of late blight in tomato leaves

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorCorrêa, Fábio Mathias-
Autor(es): dc.creatorBueno Filho, Julio Sílvio de Sousa-
Autor(es): dc.creatorCarmo, Margarida Goréte Ferreira do-
Data de aceite: dc.date.accessioned2026-02-09T12:53:07Z-
Data de disponibilização: dc.date.available2026-02-09T12:53:07Z-
Data de envio: dc.date.issued2020-01-22-
Data de envio: dc.date.issued2020-01-22-
Data de envio: dc.date.issued2009-12-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/38591-
Fonte completa do material: dc.identifierhttps://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2009.02140.x-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1170196-
Descrição: dc.descriptionThree diagrammatic grading keys were designed for the assessment of the severity of late blight (caused by Phytophthora infestans) in tomato leaves. Simplified and broad keys considered, respectively, six (3, 12, 22, 40, 60 and 77%) and eight (3, 6, 12, 22, 40, 60, 77 and 90%) levels of disease severity, whilst a modified key based on a previous proposal for potato late blight considered six levels (1, 5, 10, 16, 32 and 50%). The keys were validated by 24 evaluators who assessed digital images of tomato leaves exhibiting different areas with lesions. Evaluator errors were compared using a mixed model in which evaluators were considered as random effects and the keys and evaluations as fixed effects. The accuracy and precision of the evaluators were compared by simple linear regression between the estimated and actual values of disease severity. The repeatability of evaluators was assessed using Pearson’s correlation coefficient. There was significant (P ≤ 0·001) variability amongst the errors made by evaluators, although the precision of each of the three keys was high with a coefficient of determination (R2) of 0·96, 0·93 and 0·83 for the simplified, broad and modified key, respectively. Repeatability of estimations amongst the evaluators was adequate (correlation coefficients of 0·91, 0·91 and 0·90 for the three keys, respectively). The simplified and broad keys resulted in higher precision and accuracy for the estimation of severity than did the modified key. Since the simplified key considers a smaller number of disease severity levels, its use is recommended in the assessment of late blight in tomato leaves.-
Idioma: dc.languageen-
Publicador: dc.publisherBritish Society for Plant Pathology-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourcePlant Pathology-
Palavras-chave: dc.subjectDisease assessment-
Palavras-chave: dc.subjectDisease severity-
Palavras-chave: dc.subjectPhytophthora infestans-
Palavras-chave: dc.subjectSolanum lycopersicum-
Palavras-chave: dc.subjectTomate - Doenças-
Palavras-chave: dc.subjectAvaliação da doença-
Palavras-chave: dc.subjectGravidade da doença-
Título: dc.titleComparison of three diagrammatic keys for the quantification of late blight in tomato leaves-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

Não existem arquivos associados a este item.