Figure 5.
Difference in aggressiveness of P. ramorum clonal lineages EU1 and NA1. (A) Leaf lesion area 10 days post inoculation on two Rhododendron cultivars as a function of clonal lineage. The difference between EU1 and NA1 was significant in trials 2 and 3 (P < 0.005 and P < 0.05, respectively) (V. T. McDonald and N. J. Grünwald, unpublished data). (B) Mean lesion area in wound inoculated lower stems of Quercus rubra (data from Brasier et al., 2006). The differences between EU1 and NA1 were significant in trials 1 and 3 (P < 0.001 and P < 0.0012, respectively).