Figure 1.
Plots layout of both ascospores and conidia experimental designs implanted in Cameroon.
For the ascospores system (upper panel), the sizes of the squares (schematizing sampling sites) are proportional to the number of trap plants and the number into brackets indicates for each axis the distance between the centre and the most distant sampling site.
Figure 2.
Disease gradient measured in the field.
Density of lesions (i.e., DL, A & C) and density of resistant lesions (i.e., DRL, B & D) as a function of geographical distances from the central source. Top: ascospores site (A & B); Bottom: conidia site (C & D). The different axis of the experimental design are represented separately using different symbols. DL and DRL are plotted in “log (1+the value)” scale but values are indicated in natural scales.
Table 1.
Ascospores and Conidia experimental sites model fit results.
Figure 3.
Observed vs predicted disease gradients.
(A) Ascospore and (B) conidia experimental sites. Dispersal kernels (DK) parameter values are given in Table 1. Density of resistant lesions (DRL) is expressed in a “log (1+ of the value)” scale. Smallest dots represents sites where DRL = 0 and gaps (B) represents missing data due to plants mortality.
Figure 4.
Anisotropy functions estimated from the exponential power dispersal kernel.
Estimated directional functions (solid lines, A&C for the density and B&D for the mean distance) are compared to their equivalent uniform functions (dotted lines) for both the ascospores (A&B) and conidia (C&D) experimental site. See Table 1 for details on values and statistical support. Directional angles are given in degrees.
Table 2.
Mean and longest distance travelled along each direction.