Fig. 1. High-resolution airborne hyperspectral image acquired over one of the Apulia Xylella fastidiosa (Xf)-infected areas.

Similar datasets were collected from all Xf and Verticillium dahliae (Vd) outbreaks used for the analyses carried out in this study. a mosaic covers 1450 ha at 40 cm resolution collected with 260 spectral bands. b individual trees could be identified on the images and properly located during field work. Tree-crown segmentation algorithms (c) were used for the selection of pure vegetation pixels. Extracted reflectance (d) and radiance spectra (e) were used to calculate spectral indices, plant traits by radiative transfer model inversion, and solar-induced fluorescence (SIF) used as inputs for the disease-detection models.