Association of lesion size on oak and P. ramorum groups according to Kruskal-Wallis rank sum test1.

147 isolates in set 1 in Table 1, which include two additional isolates Pr-102 from oak in Marin County, which was used for genome sequencing and Pr-52, a widely used isolate originally from Rhododendron catawbiense in Santa Clara county were used for the analysis. Numbers in parentheses indicate number of samples.2Oak, Tan and Bay are P. ramorum isolates originating from coast live oak, tanoak and California bay laurel, respectively.