Figure 2.

ADMIXTURE of potato psyllids separated by hosts. Orange bars represent the NW genetic group and blue bars represent the W genetic group. K (the number of putative ancestral populations) = 8 was the optimal K as it minimized the cross‐validation error. Numbers below each K indicate the number of runs (out of 50) that showed the representative grouping. Sampling region is labeled along the top: C = Columbia Basin of Oregon and Washington, N = non‐potato growing region, and S = Snake River Plain of Idaho. The black vertical bars in each panel divide psyllids collected from different growing regions. The tick marks in K = 8 separate each population (combination of sampling date and locality). Samples from LB1, MES_N, and CX were genetically similar to potato psyllids from potato fields