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| Registros recuperados : 239 | |
| 167. |  | PITHAN, P. A.; ARRUDA, D. C.; GARRIDO, L. da R.; DUCATI, J. R. Avaliação espectral de doenças fúngicas em videiras. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 16.; ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 12., 2018, Bento Gonçalves. Anais... Bento Gonçalves, RS: Embrapa Uva e Vinho, 26 a 27 de setembro de 2018. p. 18.| Biblioteca(s): Embrapa Uva e Vinho. |
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| 169. | | MAIA, J. D. G.; RITSCHEL, P. S.; SOUZA, R. T. de; GARRIDO, L. da R. "BRS Vitória" - Uva para mesa, sem sementes, de sabor especial e tolerante ao míldio: recomendações agronômicas para a região de Campinas, São Paulo. Bento Gonçalves, RS: Embrapa uva e vinho, 2016. 28 p. (Embrapa Uva e Vinho. Cirular Técnica, 129)| Biblioteca(s): Embrapa Clima Temperado; Embrapa Semiárido; Embrapa Unidades Centrais; Embrapa Uva e Vinho. |
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| 170. | | HAMADA, E.; ANGELOTTI, F.; GARRIDO, L. da R.; GHINI, R.; PEDRO JÚNIOR, M.; MARÇAL, G. G. Simulação dos efeitos das mudanças climáticas sobre a escoriose da videira no Brasil. In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 16., 2013, Foz do Iguaçu. Anais... Foz do Iguaçu: INPE, 2013. p. 0252-0257.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 173. | | PITHAN, P. A.; GARRIDO, L. da R.; ARRUDA, D. C.; THUM, A. B.; HOFF, R. Spectral characterization of fungal diseases downy mildew, powdery mildew, black-foot and Petri disease on Vitis vinifera leaves. International Journal of Remote Sensing, v. 42, p. 5680-5697, 2021.| Biblioteca(s): Embrapa Uva e Vinho. |
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| 176. | | ANGELOTTI, F.; HAMADA, E.; MAGALHÃES, E. E.; GHINI, R.; GARRIDO, L. da R.; PEDRO JUNIOR, M. J. Climate change and the occurrence of downy mildew in Brazilian grapevines. Pesquisa Agropecuária Brasileira, Brasília,DF, v. 52, n. 6, p. 426-434, jun. 2017.| Biblioteca(s): Embrapa Semiárido; Embrapa Unidades Centrais. |
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| 177. | | ANGELOTTI, F.; HAMADA, E.; MAGALHÃES, E. E.; GHINI, R.; GARRIDO, L. da R.; PEDRO JÚNIOR, M. J. Climate change and the occurrence of downy mildew in Brazilian grapevines. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 6, p. 426-434, jun. 2017. Título em português: Mudanças climáticas e ocorrência do míldio da videira no Brasil.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 178. | | SILVEIRA, S. V. da; MELLO, L. M. R. de; SILVA, G. A. da; HOFFMANN, A.; GARRIDO, L. da R. Integrated production of grapes for juice in southern Brazil. IOBC/WPRS Bulletin, Darmstadt, v. 91, p. 419-423, 2013 Trabalho apresentado nos Proceedings of the 8th International Conference on Integrated Fruit Production held in Kusadasi (Turkey), October 7-12, 2012.| Biblioteca(s): Embrapa Uva e Vinho. |
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| 179. | | CHAVARRIA, G.; SANTOS, H. P. dos; FIN, E.; SÔNEGO, O. R.; GARRIDO, L. da R.; MARODIN, G. A. B. Influência da cobertura plástica na dispersão anemófila de esporangiosporos de Plasmopara viticola em cultivo de videira. In: CONGRESSO BRASILEIRO DE VITICULTURA E ENOLOGIA, 12., 2008, Bento Gonçalves. Anais... Bento Gonçalves: Embrapa Uva e Vinho, 2008. p. 101. Resumo.| Biblioteca(s): Embrapa Uva e Vinho. |
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| 180. | | NALIN, R.; RUSSI, A.; DEQUIGIOVANNI, G.; GAVA, R.; QUECINI, V.; GARRIDO, L. da R.; RITSCHEL, P. S. Análise da variabilidade genética do fungo Botryosphaeria spp., com o uso de marcadores moleculares RAPD. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA UVA E VINHO, 7.; ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 3., 2009, Bento Gonçalves. Resumos... Bento Gonçalves: Embrapa Uva e Vinho, 2009. p. 45.| Biblioteca(s): Embrapa Uva e Vinho. |
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| Registros recuperados : 239 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Uva e Vinho. Para informações adicionais entre em contato com cnpuv.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
28/06/2021 |
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Data da última atualização: |
28/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
PITHAN, P. A.; GARRIDO, L. da R.; ARRUDA, D. C.; THUM, A. B.; HOFF, R. |
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Afiliação: |
PÂMELA A. PITHAN, aCentro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; LUCAS DA RESSURREICAO GARRIDO, CNPUV; DINIZ C. ARRUDA, Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; ADRIANE B. THUM, Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; ROSEMARY HOFF, CNPUV. |
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Título: |
Spectral characterization of fungal diseases downy mildew, powdery mildew, black-foot and Petri disease on Vitis vinifera leaves. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
International Journal of Remote Sensing, v. 42, p. 5680-5697, 2021. |
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Idioma: |
Português |
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Conteúdo: |
Phytopathogenic diseases impact the development and yield of grapevines, resulting in economic, social and environmental losses. Sick plants have their metabolism changed, leading to alterations in their reflectance spectra. Little is known on these alterations, and a better knowledge could be used in the development of sensors able to detect diseases through fast, non-destructive techniques. This study was aimed at detecting spectral changes of grape leaves (Vitis vinifera cv. Cabernet Sauvignon), with early symptoms of downy mildew (Plasmopara viticola), powdery mildew (Uncinula necator), black-foot (Dactylonectria macrodidyma) and Petri disease (Phaeoacremonium spp.). Plants grown in pots and kept in a greenhouse were inoculated with the pathogens. In early stages of disease development, reflectance measurements were performed using a FieldSpec 3 spectroradiometer with leafclip attachment. The investigation began with discriminant analysis, which revealed that symptomatic plants are separated from the control ones. Reflectance spectra were therefore further investigated, looking for alterations on the shape of the spectra, characteristic of each disease. The disease descriptors were based on ratios between spectral features internal to a spectrum, a procedure which allowed the derivation of parameters intrinsic to each disease. A set of thresholds, defined as the ratios of reflectance at selected wavelengths, was derived for the studied diseases. For these ratios the selected wavelengths (nm) were R443/R496, R443/R573, R443/R695, R443/R1900, R496/R573, R496/R695, R516/R1900, and R1900/R2435. The spectra from symptomatic plants present shape changes of as much as 20% with respect to healthy plants. The observed spectral changes are larger for black-foot and powdery mildew, but some wavelength ratios are also indicators of downy mildew and Petri disease. Data from wavelengths shorter than 700nm in general carry more information than measurements at near infrared. These results are potentially useful to the development of low-cost devices to field use, providing real-time disease detection to early assessment of vineyard health status. MenosPhytopathogenic diseases impact the development and yield of grapevines, resulting in economic, social and environmental losses. Sick plants have their metabolism changed, leading to alterations in their reflectance spectra. Little is known on these alterations, and a better knowledge could be used in the development of sensors able to detect diseases through fast, non-destructive techniques. This study was aimed at detecting spectral changes of grape leaves (Vitis vinifera cv. Cabernet Sauvignon), with early symptoms of downy mildew (Plasmopara viticola), powdery mildew (Uncinula necator), black-foot (Dactylonectria macrodidyma) and Petri disease (Phaeoacremonium spp.). Plants grown in pots and kept in a greenhouse were inoculated with the pathogens. In early stages of disease development, reflectance measurements were performed using a FieldSpec 3 spectroradiometer with leafclip attachment. The investigation began with discriminant analysis, which revealed that symptomatic plants are separated from the control ones. Reflectance spectra were therefore further investigated, looking for alterations on the shape of the spectra, characteristic of each disease. The disease descriptors were based on ratios between spectral features internal to a spectrum, a procedure which allowed the derivation of parameters intrinsic to each disease. A set of thresholds, defined as the ratios of reflectance at selected wavelengths, was derived for the studied diseases. For these ratios the sele... Mostrar Tudo |
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Palavras-Chave: |
Dactylonectria macrodidyma; Phaeoacremonium spp; Vine reflectance. |
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Thesaurus NAL: |
Plasmopara viticola; Uncinula necator. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02914naa a2200229 a 4500
001 2132605
005 2021-06-28
008 2021 bl uuuu u00u1 u #d
100 1 $aPITHAN, P. A.
245 $aSpectral characterization of fungal diseases downy mildew, powdery mildew, black-foot and Petri disease on Vitis vinifera leaves.$h[electronic resource]
260 $c2021
520 $aPhytopathogenic diseases impact the development and yield of grapevines, resulting in economic, social and environmental losses. Sick plants have their metabolism changed, leading to alterations in their reflectance spectra. Little is known on these alterations, and a better knowledge could be used in the development of sensors able to detect diseases through fast, non-destructive techniques. This study was aimed at detecting spectral changes of grape leaves (Vitis vinifera cv. Cabernet Sauvignon), with early symptoms of downy mildew (Plasmopara viticola), powdery mildew (Uncinula necator), black-foot (Dactylonectria macrodidyma) and Petri disease (Phaeoacremonium spp.). Plants grown in pots and kept in a greenhouse were inoculated with the pathogens. In early stages of disease development, reflectance measurements were performed using a FieldSpec 3 spectroradiometer with leafclip attachment. The investigation began with discriminant analysis, which revealed that symptomatic plants are separated from the control ones. Reflectance spectra were therefore further investigated, looking for alterations on the shape of the spectra, characteristic of each disease. The disease descriptors were based on ratios between spectral features internal to a spectrum, a procedure which allowed the derivation of parameters intrinsic to each disease. A set of thresholds, defined as the ratios of reflectance at selected wavelengths, was derived for the studied diseases. For these ratios the selected wavelengths (nm) were R443/R496, R443/R573, R443/R695, R443/R1900, R496/R573, R496/R695, R516/R1900, and R1900/R2435. The spectra from symptomatic plants present shape changes of as much as 20% with respect to healthy plants. The observed spectral changes are larger for black-foot and powdery mildew, but some wavelength ratios are also indicators of downy mildew and Petri disease. Data from wavelengths shorter than 700nm in general carry more information than measurements at near infrared. These results are potentially useful to the development of low-cost devices to field use, providing real-time disease detection to early assessment of vineyard health status.
650 $aPlasmopara viticola
650 $aUncinula necator
653 $aDactylonectria macrodidyma
653 $aPhaeoacremonium spp
653 $aVine reflectance
700 1 $aGARRIDO, L. da R.
700 1 $aARRUDA, D. C.
700 1 $aTHUM, A. B.
700 1 $aHOFF, R.
773 $tInternational Journal of Remote Sensing$gv. 42, p. 5680-5697, 2021.
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