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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
16/09/2014 |
Data da última atualização: |
16/09/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BUFFARA, C. R. S.; ANGELOTTI, F.; VIEIRA, R. A.; BOGO, A.; TESSMANN, D. J.; BEM, B. P. de. |
Afiliação: |
CLÁUDIA REGINA SCAPIN BUFFARA, Universidade Estadual de Maringá; FRANCISLENE ANGELOTTI, CPATSA; RAFAEL AUGUSTO VIEIRA, Universidade Estadual de Maringá; AMAURI BOGO, Universidade do Estado de Santa Catarina; DAURI JOSÉ TESSMANN, Universidade Estadual de Maringá; BETINA PERREIRA DE BEM, Universidade do Estado de Santa Catarina. |
Título: |
Elaboration and validation of a diagrammatic scale to assess downy mildew severity in grapevine. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Ciência Rural, Santa Maria, v. 44, n. 8, p. 1384-1391, ago, 2014. |
DOI: |
10.1590/0103-8478cr20131548 |
Idioma: |
Inglês |
Conteúdo: |
The downy mildew, caused by Plasmopora viticola, is one of the most important grapevine (Vitis vinifera) diseases in Southern Brazil, causing defoliation and economic losses. The evaluation of disease severity is an important decision for adoption of strategies and tactics for disease control. Therefore, the objective of this work was to elaborate and to validate a diagrammatic scale to assess downy mildew severity in grapevine, respecting the limitations of visual acuity. The diagrammatic scale with seven levels of disease severity of 1, 3, 6, 12, 25, 50 and 75% was developed in two versions of black-and-white and color scale. The scales were tested and validated by eight raters with and without previous experience with grapevine downy mildew. The raters estimated the severity of 30 grapevine leaves with different downy mildew severity, with and without the use of the scales. Minimum, intermediate and maximum severity levels were collected according to Weber-Fechner?s stimulus-response law. The accuracy and precision were analyzed by linear regression between the actual and the estimated severity. Actual severity was assessed with ASSESS® Program. The scales provided good levels of accuracy (means of 88%) and excellent levels of precision (means of 95%). The raters showed great precision and accuracy when used the diagrammatic scale. The color scale provided more precise and accurate estimates than the black-and-white scale. The scale proposed in this work presented appropriate applicability for downy mildew evaluation in grapevine. MenosThe downy mildew, caused by Plasmopora viticola, is one of the most important grapevine (Vitis vinifera) diseases in Southern Brazil, causing defoliation and economic losses. The evaluation of disease severity is an important decision for adoption of strategies and tactics for disease control. Therefore, the objective of this work was to elaborate and to validate a diagrammatic scale to assess downy mildew severity in grapevine, respecting the limitations of visual acuity. The diagrammatic scale with seven levels of disease severity of 1, 3, 6, 12, 25, 50 and 75% was developed in two versions of black-and-white and color scale. The scales were tested and validated by eight raters with and without previous experience with grapevine downy mildew. The raters estimated the severity of 30 grapevine leaves with different downy mildew severity, with and without the use of the scales. Minimum, intermediate and maximum severity levels were collected according to Weber-Fechner?s stimulus-response law. The accuracy and precision were analyzed by linear regression between the actual and the estimated severity. Actual severity was assessed with ASSESS® Program. The scales provided good levels of accuracy (means of 88%) and excellent levels of precision (means of 95%). The raters showed great precision and accuracy when used the diagrammatic scale. The color scale provided more precise and accurate estimates than the black-and-white scale. The scale proposed in this work presented appropr... Mostrar Tudo |
Palavras-Chave: |
Disease; Míldio da videira; Plasmopora viticola. |
Thesagro: |
Doença; Fungo; Uva; Vitis Vinifera. |
Thesaurus Nal: |
Grapes. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/108468/1/Fran-1-2014.pdf
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Marc: |
LEADER 02384naa a2200289 a 4500 001 1994988 005 2014-09-16 008 2014 bl uuuu u00u1 u #d 024 7 $a10.1590/0103-8478cr20131548$2DOI 100 1 $aBUFFARA, C. R. S. 245 $aElaboration and validation of a diagrammatic scale to assess downy mildew severity in grapevine.$h[electronic resource] 260 $c2014 520 $aThe downy mildew, caused by Plasmopora viticola, is one of the most important grapevine (Vitis vinifera) diseases in Southern Brazil, causing defoliation and economic losses. The evaluation of disease severity is an important decision for adoption of strategies and tactics for disease control. Therefore, the objective of this work was to elaborate and to validate a diagrammatic scale to assess downy mildew severity in grapevine, respecting the limitations of visual acuity. The diagrammatic scale with seven levels of disease severity of 1, 3, 6, 12, 25, 50 and 75% was developed in two versions of black-and-white and color scale. The scales were tested and validated by eight raters with and without previous experience with grapevine downy mildew. The raters estimated the severity of 30 grapevine leaves with different downy mildew severity, with and without the use of the scales. Minimum, intermediate and maximum severity levels were collected according to Weber-Fechner?s stimulus-response law. The accuracy and precision were analyzed by linear regression between the actual and the estimated severity. Actual severity was assessed with ASSESS® Program. The scales provided good levels of accuracy (means of 88%) and excellent levels of precision (means of 95%). The raters showed great precision and accuracy when used the diagrammatic scale. The color scale provided more precise and accurate estimates than the black-and-white scale. The scale proposed in this work presented appropriate applicability for downy mildew evaluation in grapevine. 650 $aGrapes 650 $aDoença 650 $aFungo 650 $aUva 650 $aVitis Vinifera 653 $aDisease 653 $aMíldio da videira 653 $aPlasmopora viticola 700 1 $aANGELOTTI, F. 700 1 $aVIEIRA, R. A. 700 1 $aBOGO, A. 700 1 $aTESSMANN, D. J. 700 1 $aBEM, B. P. de 773 $tCiência Rural, Santa Maria$gv. 44, n. 8, p. 1384-1391, ago, 2014.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
Data corrente: |
15/02/2005 |
Data da última atualização: |
11/06/2019 |
Autoria: |
SANTOS, M. de M. |
Afiliação: |
Márcio de Miranda Santos, CNPSD. |
Título: |
Relatório da prospecção em seringal nativo de Hevea benthamiana na região de Barcelos - AM. |
Ano de publicação: |
1982 |
Fonte/Imprenta: |
Manaus: EMBRAPA-CNPSD, 1982. |
Páginas: |
21 p., il. |
Idioma: |
Português |
Conteúdo: |
Descrição da região prospectada. Os seringais. Composição botânica. Sistema de exploração e beneficiamento primário. Produtividade e qualidade do produto obtido. Período do fábrico e queda de sementes. Descrição das matrizes. Mapa de enxertia. Mapa da região prospectada. Distribuição do gênero Hevea. Análise da fertilidade e granulometrica dos solos prospectados. |
Palavras-Chave: |
Amazonas; Barcelos; Brasil; Hevea benthamiana. |
Thesagro: |
Seringueira. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/198458/1/RELATORIO-DA-PROSPECCAO....pdf
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Marc: |
LEADER 00873nam a2200181 a 4500 001 1674828 005 2019-06-11 008 1982 bl uuuu t 00u1 u #d 100 1 $aSANTOS, M. de M. 245 $aRelatório da prospecção em seringal nativo de Hevea benthamiana na região de Barcelos - AM. 260 $aManaus: EMBRAPA-CNPSD$c1982 300 $a21 p., il. 520 $aDescrição da região prospectada. Os seringais. Composição botânica. Sistema de exploração e beneficiamento primário. Produtividade e qualidade do produto obtido. Período do fábrico e queda de sementes. Descrição das matrizes. Mapa de enxertia. Mapa da região prospectada. Distribuição do gênero Hevea. Análise da fertilidade e granulometrica dos solos prospectados. 650 $aSeringueira 653 $aAmazonas 653 $aBarcelos 653 $aBrasil 653 $aHevea benthamiana
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