Figure 1

Average reflectance spectra of healthy, asymptomatic, early stage and late stage leaves: (a) spectral ranges of 400–2500 nm, (b) zoomed in spectral ranges of 450–700 nm, (c) zoomed in spectral ranges of 780–980 nm, (d) zoomed in spectral ranges of 1100–1950 nm and (e) zoomed in spectral ranges of 1950–2400 nm.