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metadata.artigo.dc.title: Diagrammatic scales for assessing brown eye spot (Cercospora coffeicola) in red and yellow coffee cherries
metadata.artigo.dc.creator: Paula, Paulo V. A. Azevedo de
Pozza, Edson A.
Santos, Leandro A.
Chaves, Eugênio
Maciel, Matheus P.
Paula, Júlio César A.
metadata.artigo.dc.subject: Coffea arabica
Coffee disease
Coffee - Brown eye spot
Plant disease assessment
Café - Doenças
Avaliação de doenças de plantas
metadata.artigo.dc.publisher: Wiley Oct-2016
metadata.artigo.dc.identifier.citation: PAULA, P. V. A. A. de et al. Diagrammatic scales for assessing brown eye spot (Cercospora coffeicola) in red and yellow coffee cherries. Journal of Phytopathology, Berlin, v. 164, n. 10, p. 791-800, Oct. 2016.
metadata.artigo.dc.description.abstract: Brazil is the world's largest coffee producer. Brown eye spot (BES) (Cercospora coffeicola) is a major crop disease that can cause 15–30% production losses and decrease the coffee beverage quality. Although the influence of this disease on beverage quality has been studied, diagrammatic scales for assessment of the disease severity in berries are still unexplored. Thus, this study has developed and validated diagrammatic scales to assess the severity of BES. Two diagrammatic scales were designed to assess the disease in berries, which can be yellow or red depending on the cultivar. The scale of yellow berries had nine grades: grade 0: 0%; 1: 0.1–5.0%; 2: 5.1–10.0%; 3: 10.1–15.0%; 4: 15.1–20.0%; 5: 20.1–30.0%; 6: 30.1–40.0%; 7: 40.1–60.0%; and 8: higher than 60.0%, while the scale of red berries had eight grades: grade 0: 0%; 1: 0.1–2.5%; 2: 2.6–5.0%; 3: 5.1–10.0%; 4: 10.1–20.0%; 5: 20.1–30.0%; 6: 30.1–50.0%; and 7: higher than 50.0% severity. Using scales improved accuracy and precision with R2 = 0.99 and provided good repeatability and reproducibility of assessments of disease severity. Both scales can be used because the different berry colour influenced the accuracy and precision between the scales.
metadata.artigo.dc.language: en_US
Appears in Collections:DFP - Artigos publicados em periódicos

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