Figure 3.

Derivation of the final key time points based predictors for disease classification and quantification. Key time points extracted from disease-sensitive and disease-insensitive spectral vegetation indices (SVI) are combined to isolate the effect of the disease from other effects (e.g., contrasting stay-green) by calculating the differences (highlighted by red arrows). (A) Control, “healthy” plot. (B) Inoculated, “diseased” plot. For change parameters, the ratio, rather than the difference, was calculated.