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| Registros recuperados : 21 | |
| 2. |  | PAULETTO, H.; JUNGES, A. H.; HOFF, R. Imagens de média e alta resolução espacial como apoio à viticultura de precisão: variabilidade do índice de vegetação por diferença normalizada em vinhedo da região da Campanha, Brasil. 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. 11. (Embrapa Uva e Vinho. Documentos, 108)| Biblioteca(s): Embrapa Uva e Vinho. |
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| 3. | | JUNGES, A. H.; ANZANELLO, R.; HOFF, R. Perfil temporal de índice de vegetação obtido por sensor remoto ativo em vinhedos "Chardonnay" em Veranópolis, Brasil. In: CONGRESSO LATINO-AMERICANO DE VITICULTURA E ENOLOGIA, 15.; CONGRESSO BRASILEIRO DE VITICULTURA E ENOLOGIA, 13., 2015, Bento Gonçalves. Resumos... Bento Gonçalves: Embrapa Uva e Vinho: Associação Brasileira de Enologia, 2015. p. 527. XV Congresso Latino-Americano de Viticultura e Enologia E XIII Congresso Brasileiro de Viticultura e Enologia. Bento Gonçalves-RS, 3 a 7 de Novembro de 2015.| Biblioteca(s): Embrapa Uva e Vinho. |
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| 5. | | PAULETTO, H.; JUNGES, A. H.; HOFF, R.; VALENTI, E. da S. Avaliação de imagens de diferentes resoluções espaciais para caracterização do índice de vegetação NDVI em vinhedo da região da Campanha, Brasil. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 17., ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 13., 2019, Bento Gonçalves. Anais... Bento Gonçalves: Embrapa Uva e Vinho, 18 e 19 de julho de 2019. (Embrapa Uva e Vinho. Documentos, 115). Resumo 07.| Biblioteca(s): Embrapa Uva e Vinho. |
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| 19. | | PITHAN, P. A.; JUNGES, A. H.; FARIAS, A. R.; ANZANELLO, R.; HOFF, R. Monitoramento do ciclo de videiras pelo Índice de Vegetação por Diferença Normalizada obtido de imagens Landsat 8 no município de Veranópolis-RS, Brasil. In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO - SBSR, 17., 2015, João Pessoa-PB. Anais... João Pessoa: INPE, 2015.| Biblioteca(s): Embrapa Territorial; Embrapa Uva e Vinho. |
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| Registros recuperados : 21 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
29/09/2020 |
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Data da última atualização: |
08/12/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
JUNGES, A. H.; ALMANÇA, M. A. K.; FAJARDO, T. V. M.; DUCATI, J. R. |
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Afiliação: |
AMANDA HEEMANN JUNGES, Departamento de Diagnóstico e Pesquisa Agropecuária, Secretaria da Agricultura, Pecuária e Desenvolvimento Rural, Veranópolis, RS 95330-000, Brazil; MARCUS ANDRÉ KURTZ ALMANÇA, Campus Bento Gonçalves Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Bento Gonçalves, RS 95700-206, Brazil; THOR VINICIUS MARTINS FAJARDO, CNPUV; JORGE RICARDO DUCATI, Universidade Federal do Rio Grande do Sul, Instituto de Física Departamento de Astronomia, Porto Alegre, RS 91501-970, Brazil. |
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Título: |
Leaf hyperspectral reflectance as a potential tool to detect diseases associated with vineyard decline. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Tropical Plant Pathology, V. 45, P. 522-533, 2020. |
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DOI: |
https://doi.org/10.1007/s40858-020-00387-0 |
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Idioma: |
Inglês |
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Conteúdo: |
Grape production in the Serra Gaúcha region, south of Brazil, is severily constrained by several diseases such as the decline and death syndrome caused grapevine trunk (fungal) diseases (GTDs) and the grapevine leafroll-associated virus (GLRaV). As pathogens induce changes in leaf tissue that modify the reflectance, the spectral signature of asymptomatic and symptomatic grapevine leaves infected by GTDs and GLRaV was analyzed to check whether spectral responses could be useful for disease identification. This work aims at (a) defining the spectral signature of grapevine leaves asymptomatic and symptomatic to GTDs and GLRaV; b) analyzing whether the spectral response of asymptomatic leaves can be distinguished from symptomatic; and (c) defining the most useful wavelengths for discriminating spectral responses. For such, reflectance of leaves in either condition collected in a ?Merlot? vineyard during three growing seasons was measured using a spectroradiometer. Principal components and partial least square discriminant analyses confirmed the spectral separation and classes discrimination. The average spectra, difference spectra, and first-order derivative (FOD) spectra indicated differences between asymptomatic and symptomatic leaves in the green peak (520?550 nm), chlorophyll-associated wavelengths (650?670 nm), red edge (700?720 nm), beginning of nearinfrared (800?900 nm), and shortwave infrared. Hyperspectral data was linked to biochemical and physiological changes described for GTD and GLRaV. Variable importance in the projection (VIP) analysis showed that some wavelengths allowed to differentiate the tested pathosystems and could serve as a basis for further validation and disease classification studies. Keywords Grapevine leafroll-associated virus . Grapevine trunk diseases . Vitis vinifera L. . Principal components analysis . Variable importance in the projection MenosGrape production in the Serra Gaúcha region, south of Brazil, is severily constrained by several diseases such as the decline and death syndrome caused grapevine trunk (fungal) diseases (GTDs) and the grapevine leafroll-associated virus (GLRaV). As pathogens induce changes in leaf tissue that modify the reflectance, the spectral signature of asymptomatic and symptomatic grapevine leaves infected by GTDs and GLRaV was analyzed to check whether spectral responses could be useful for disease identification. This work aims at (a) defining the spectral signature of grapevine leaves asymptomatic and symptomatic to GTDs and GLRaV; b) analyzing whether the spectral response of asymptomatic leaves can be distinguished from symptomatic; and (c) defining the most useful wavelengths for discriminating spectral responses. For such, reflectance of leaves in either condition collected in a ?Merlot? vineyard during three growing seasons was measured using a spectroradiometer. Principal components and partial least square discriminant analyses confirmed the spectral separation and classes discrimination. The average spectra, difference spectra, and first-order derivative (FOD) spectra indicated differences between asymptomatic and symptomatic leaves in the green peak (520?550 nm), chlorophyll-associated wavelengths (650?670 nm), red edge (700?720 nm), beginning of nearinfrared (800?900 nm), and shortwave infrared. Hyperspectral data was linked to biochemical and physiological changes describ... Mostrar Tudo |
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Palavras-Chave: |
Grapevine trunk diseases; Principal components analysis; Variable importance in the projection. |
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Thesagro: |
Uva; Vitis Vinifera. |
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Thesaurus NAL: |
Grapes; Grapevine leafroll-associated virus. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/216294/1/TPP-Leaf-hyperspectral-reflectance-as-potential-tool-to-detect-diseases-v-45-2020.pdf
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Marc: |
LEADER 02732naa a2200253 a 4500
001 2125179
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008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s40858-020-00387-0$2DOI
100 1 $aJUNGES, A. H.
245 $aLeaf hyperspectral reflectance as a potential tool to detect diseases associated with vineyard decline.$h[electronic resource]
260 $c2020
520 $aGrape production in the Serra Gaúcha region, south of Brazil, is severily constrained by several diseases such as the decline and death syndrome caused grapevine trunk (fungal) diseases (GTDs) and the grapevine leafroll-associated virus (GLRaV). As pathogens induce changes in leaf tissue that modify the reflectance, the spectral signature of asymptomatic and symptomatic grapevine leaves infected by GTDs and GLRaV was analyzed to check whether spectral responses could be useful for disease identification. This work aims at (a) defining the spectral signature of grapevine leaves asymptomatic and symptomatic to GTDs and GLRaV; b) analyzing whether the spectral response of asymptomatic leaves can be distinguished from symptomatic; and (c) defining the most useful wavelengths for discriminating spectral responses. For such, reflectance of leaves in either condition collected in a ?Merlot? vineyard during three growing seasons was measured using a spectroradiometer. Principal components and partial least square discriminant analyses confirmed the spectral separation and classes discrimination. The average spectra, difference spectra, and first-order derivative (FOD) spectra indicated differences between asymptomatic and symptomatic leaves in the green peak (520?550 nm), chlorophyll-associated wavelengths (650?670 nm), red edge (700?720 nm), beginning of nearinfrared (800?900 nm), and shortwave infrared. Hyperspectral data was linked to biochemical and physiological changes described for GTD and GLRaV. Variable importance in the projection (VIP) analysis showed that some wavelengths allowed to differentiate the tested pathosystems and could serve as a basis for further validation and disease classification studies. Keywords Grapevine leafroll-associated virus . Grapevine trunk diseases . Vitis vinifera L. . Principal components analysis . Variable importance in the projection
650 $aGrapes
650 $aGrapevine leafroll-associated virus
650 $aUva
650 $aVitis Vinifera
653 $aGrapevine trunk diseases
653 $aPrincipal components analysis
653 $aVariable importance in the projection
700 1 $aALMANÇA, M. A. K.
700 1 $aFAJARDO, T. V. M.
700 1 $aDUCATI, J. R.
773 $tTropical Plant Pathology, V. 45, P. 522-533, 2020.
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Embrapa Uva e Vinho (CNPUV) |
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