A system-theoretic approach for image-based infectious plant disease severity estimation
Fig 5
Examples of lesions on grape leaf caused by various infectious diseases.
(A) Black rot (Guignardia bidwellii), (B) Leaf blight (Pseudocercospora vitis), (C) Esca (Phaeomoniella spp.), and (D) Downy mildew (Plasmopara viticola).