Fig. 7 presents the bacterial cell population distribution x for
Te ¼ 10 or 25 C. It is seen that a different number of leaves are
consecutively populated in the allotted time, the higher Te allowing
for a deeper contamination from the external leaf. In order to
monitor the contamination intensity and depth, xavg was computed
through a volume integration extended to the leaf denoted by its
index Li. When Te ¼ 10 C, the average cell population of last
contaminated leaf L2 is xavg;L2
Te¼10 C
¼ 0:20 log CFU/g (Fig. 7, left).
In comparison, When Te ¼ 25 C, a similar level of local contamination
is found in the last contaminated leaf L8
(xavg;L8
Te¼25 C
¼ 0:27 log CFU/g) (Fig. 7, right).