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Title: | Escala diagramática para avaliação da severidade da mancha de Phoma do cafeeiro |
Other Titles: | Diagrammatic scale to evaluate severity of phoma leaf blight of coffee trees |
Keywords: | Coffea spp. Patometria Epidemiologia Manejo de doenças de plantas Agricultura tropical Pathometry Plant disease epidemiology Plant disease management Tropical agriculture |
Issue Date: | 2009 |
Publisher: | Sociedade Brasileira de Fitopatologia |
Citation: | SALGADO, M. et al. Escala diagramática para avaliação da severidade da mancha de Phoma do cafeeiro. Tropical Plant Pathology, Brasília, DF, v. 34, n. 6, p. 422-427, 2009. |
Abstract: | With the aim of offering an aid to evaluate disease severity of phoma leaf blight of coffee trees, a diagrammatic scale with eight levels of severity was developed. The scale was then validated by seven independent testers. As to the precision of the scale, R2 values varied between 0.82 and 0.87, and 0.85 and 0.94, with and without the use of the scale, respectively. The absolute average error, expressing the real severity minus the estimated severity , was mostly lower than 10%. The scale evidenced good accuracy, with estimated values of severity close to the values of real severity. Reproducibility of the estimated values by the raters was satisfactory, with R2 values superior to 0.75 in all cases. This validated scale is a suitable tool for the evaluation of the severity of Phoma leaf blight, one of the most important diseases of the coffee tree. |
URI: | http://repositorio.ufla.br/jspui/handle/1/28466 |
Appears in Collections: | DFP - Artigos publicados em periódicos |
Files in This Item:
File | Description | Size | Format | |
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ARTIGO_Escala diagramática para avaliação da severidade da mancha de.pdf | 1,86 MB | Adobe PDF | View/Open |
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