Title:	Diagrammatic scale for assessment of grapevine rust.
Authors:	ANGELOTTI, F. SCAPIN, C. R. TESSMANN, D. J. VIDA, J. B. OLIVEIRA, R. R. CANTERI, M. G.
Affiliation:	FRANCISLENE ANGELOTTI, CPATSA CLAUDIA R. SCAPIN, UNIVERSIDADE ESTADUAL DE MARINGÁ DAURI J. TESSMANN, UNIVERSIDADE ESTADUAL DE MARINGÁ JOÃO B. VIDA, UNIVERSIDADE ESTADUAL DE MARINGÁ RICARDO R. OLIVEIRA, UNIVERSIDADE ESTADUAL DE MARINGÁ MARCELO G. CANTERI, UNIVERSIDADE ESTADUAL DE LONDRINA.
Date Issued:	2008
Citation:	Tropical Plant Pathology, v. 33, n. 3, p. 439-443, nov./dez. 2008.
Description:	A diagrammatic scale with six levels of disease severity (1, 5, 12, 25, 50 and 75%) was developed to assess grapevine (Vitis spp.) rust severity, caused by the fungus Phakopsora euvitis. Two versions of the scale, in black-and-white and in color, were validated by seven raters without previous experience with grapevine rust, who estimated the severity of 30 grapevine leaves showing rust symptoms, with and without the use of the scales. Precision and accuracy were determined by linear regression, relating the assessments using the scales to actual severity. Actual severity was assessed with the software ASSESS®. Using the diagrammatic scales, some raters were able to improve precision and accuracy. The color scale provided slightly more precise and accurate estimates than the black-and-white scale. Keywords: disease assessment, pathometry, Phakopsora euvitis, Vitis spp
Thesagro:	Uva Ferrugem Doença Fungo
NAL Thesaurus:	Grapes
Keywords:	Videira Phakopsora euvitis Avaliação Patometria Vitis spp
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPATSA)