|
|
| 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 |
Biblioteca(s): |
Embrapa Uva e Vinho. |
Data corrente: |
28/06/2021 |
Data da última atualização: |
28/06/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PITHAN, P. A.; GARRIDO, L. da R.; ARRUDA, D. C.; THUM, A. B.; HOFF, R. |
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. |
Título: |
Spectral characterization of fungal diseases downy mildew, powdery mildew, black-foot and Petri disease on Vitis vinifera leaves. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
International Journal of Remote Sensing, v. 42, p. 5680-5697, 2021. |
Idioma: |
Português |
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 |
Palavras-Chave: |
Dactylonectria macrodidyma; Phaeoacremonium spp; Vine reflectance. |
Thesaurus Nal: |
Plasmopara viticola; Uncinula necator. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Uva e Vinho (CNPUV) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
21/05/2020 |
Data da última atualização: |
21/05/2020 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MORAIS, D. K.; BENTO, J. A. C.; BRAGA, S. S.; CARVALHO, R. N.; BASSINELLO, P. Z. |
Afiliação: |
DAISY KARIONE MORAIS, estagiária CNPAF; JULIANA APARECIDA CORREIA BENTO, estagiária CNPAF; SVETLANA SOUZA BRAGA, estagiária CNPAF; ROSANGELA NUNES CARVALHO, CNPAF; PRISCILA ZACZUK BASSINELLO, CNPAF. |
Título: |
Uso de arroz e feijão de baixa qualidade industrial em produto alimentício nobre. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
In: SEMINÁRIO JOVENS TALENTOS, 13., 2019, Santo Antônio de Goiás. Resumos... Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2019. |
Páginas: |
p. 30. |
ISBN: |
978-65-86056-69-3 |
Idioma: |
Português |
Conteúdo: |
O objetivo deste trabalho foi desenvolver e caracterizar biscoitos tipo chips a base de farinhas de grãos quebrados de arroz polido e de feijão carioca, bem como verificar a influência de diferentes proporções de arroz polido na qualidade sensorial do produto |
Thesagro: |
Alimento; Arroz; Beneficiamento; Feijão; Nutrição Humana; Qualidade. |
Categoria do assunto: |
Q Alimentos e Nutrição Humana |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/213142/1/CNPAF-2019-jt-p30.pdf
|
Marc: |
LEADER 01054nam a2200253 a 4500 001 2122462 005 2020-05-21 008 2019 bl uuuu u00u1 u #d 020 $a978-65-86056-69-3 100 1 $aMORAIS, D. K. 245 $aUso de arroz e feijão de baixa qualidade industrial em produto alimentício nobre.$h[electronic resource] 260 $aIn: SEMINÁRIO JOVENS TALENTOS, 13., 2019, Santo Antônio de Goiás. Resumos... Santo Antônio de Goiás: Embrapa Arroz e Feijão$c2019 300 $ap. 30. 520 $aO objetivo deste trabalho foi desenvolver e caracterizar biscoitos tipo chips a base de farinhas de grãos quebrados de arroz polido e de feijão carioca, bem como verificar a influência de diferentes proporções de arroz polido na qualidade sensorial do produto 650 $aAlimento 650 $aArroz 650 $aBeneficiamento 650 $aFeijão 650 $aNutrição Humana 650 $aQualidade 700 1 $aBENTO, J. A. C. 700 1 $aBRAGA, S. S. 700 1 $aCARVALHO, R. N. 700 1 $aBASSINELLO, P. Z.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|