Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/28466
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

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