Fig. 1.

Vertical distribution of leaf area (m² m^–2 of ground) as a function of height within virtual 3-D canopies, in mixtures of two cultivars with contrasting canopy structure. Healthy leaves correspond to leaves 1–3 (from the top, leaf 1 is the highest leaf or flag leaf). Diseased leaves correspond to leaves 4 and 5 that had sporulating lesions. Virtual 3-D canopies were designed by combining measurements of leaf curvature and organ dimensions obtained from a field experiment. The s.e. error of the vertical distribution of leaf area ranged from 1.23 × 10^–3 to 1.67 × 10^–10 (m² m^–2 of ground).