The aim of this work was to investigate the applicability of vis/NIR spectroscopy for rapid grape infection assessment in a view of a grape classification directly at the check point station entering the winery. The experimentation was conducted on white and red wine varieties, using grape bunches naturally infected with Botrytis cinerea, powdery mildew and sour rot, the major grape diseases. The research applied a compact vis/NIR device (400-1600 nm) for analysis of flows and/or non-homogeneous product. The system is capable to perform measurements in reflection at a variable distance between sensor and sample of 80-600 mm. Spectral measurements were carried out on healthy and diseased bunches for a total of 2559 spectral acquisitions; Qualitative (spectral analysis and Principal Component Analysis, PCA) and quantitative (Partial Least Squares – Discriminant Analysis, PLS-DA) analyses were applied on grape and must spectra in order to test the performance of vis/NIR device to classify healthy and infected samples. The results obtained from PLS-DA models, in validation, gave a positive predictive value (PPV) of classification between 89.8% and 94.0% for grape. The results demonstrated that optical devices are capable to provide useful information for a better management of the vinification process.

Application of visible/near infrared spectroscopy to assess the grape infection at the winery / A. Tugnolo, V. Giovenzana, R. Beghi, L. Brancadoro, R. Guidetti. ((Intervento presentato al 10. convegno Enoforum tenutosi a Vicenza nel 2017.

Application of visible/near infrared spectroscopy to assess the grape infection at the winery

A. Tugnolo;V. Giovenzana;R. Beghi;L. Brancadoro;R. Guidetti
2017-05-16

Abstract

The aim of this work was to investigate the applicability of vis/NIR spectroscopy for rapid grape infection assessment in a view of a grape classification directly at the check point station entering the winery. The experimentation was conducted on white and red wine varieties, using grape bunches naturally infected with Botrytis cinerea, powdery mildew and sour rot, the major grape diseases. The research applied a compact vis/NIR device (400-1600 nm) for analysis of flows and/or non-homogeneous product. The system is capable to perform measurements in reflection at a variable distance between sensor and sample of 80-600 mm. Spectral measurements were carried out on healthy and diseased bunches for a total of 2559 spectral acquisitions; Qualitative (spectral analysis and Principal Component Analysis, PCA) and quantitative (Partial Least Squares – Discriminant Analysis, PLS-DA) analyses were applied on grape and must spectra in order to test the performance of vis/NIR device to classify healthy and infected samples. The results obtained from PLS-DA models, in validation, gave a positive predictive value (PPV) of classification between 89.8% and 94.0% for grape. The results demonstrated that optical devices are capable to provide useful information for a better management of the vinification process.
Settore AGR/09 - Meccanica Agraria
Application of visible/near infrared spectroscopy to assess the grape infection at the winery / A. Tugnolo, V. Giovenzana, R. Beghi, L. Brancadoro, R. Guidetti. ((Intervento presentato al 10. convegno Enoforum tenutosi a Vicenza nel 2017.
Conference Object
File in questo prodotto:
File Dimensione Formato  
Poster finale_PDF A0.pdf

accesso aperto

Descrizione: Poster
Tipologia: Altro
Dimensione 1.17 MB
Formato Adobe PDF
1.17 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/497376
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact