Spatial–Spectral Analysis of Hyperspectral Images Reveals Early Detection of Downy Mildew on Grapevine Leaves - Archive ouverte HAL Access content directly
Journal Articles International Journal of Molecular Sciences Year : 2022

Spatial–Spectral Analysis of Hyperspectral Images Reveals Early Detection of Downy Mildew on Grapevine Leaves

(1) , (1) , (2) , (3) , (3) , (1)
1
2
3

Abstract

Downy mildew is a highly destructive disease of grapevine. Currently, monitoring for its symptoms is time-consuming and requires specialist staff. Therefore, an automated non-destructive method to detect the pathogen before the visible symptoms appear would be beneficial for early targeted treatments. The aim of this study was to detect the disease early in a controlled environment, and to monitor the disease severity evolution in time and space. We used a hyperspectral image database following the development from 0 to 9 days post inoculation (dpi) of three strains of Plasmopara viticola inoculated on grapevine leaves and developed an automatic detection tool based on a Support Vector Machine (SVM) classifier. The SVM obtained promising validation average accuracy scores of 0.96, a test accuracy score of 0.99, and it did not output false positives on the control leaves and detected downy mildew at 2 dpi, 2 days before the clear onset of visual symptoms at 4 dpi. Moreover, the disease area detected over time was higher than that when visually assessed, providing a better evaluation of disease severity. To our knowledge, this is the first study using hyperspectral imaging to automatically detect and show the spatial distribution of downy mildew on grapevine leaves early over time.
Fichier principal
Vignette du fichier
2022_Lacotte.pdf (1.67 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03781756 , version 1 (20-09-2022)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Virginie Lacotte, Sergio Peignier, Marc Raynal, Isabelle Demeaux, François Delmotte, et al.. Spatial–Spectral Analysis of Hyperspectral Images Reveals Early Detection of Downy Mildew on Grapevine Leaves. International Journal of Molecular Sciences, 2022, 23 (17), pp.10012. ⟨10.3390/ijms231710012⟩. ⟨hal-03781756⟩
54 View
6 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More