Host range of the three most abundant Tetranychus urticae CO1-based cytotypes (C1, C2 and C3) identified in 2015, 2016 and 2017 (left, middle, and right, respectively). Percentages on the x-axis represent the number of individuals belonging to a cytotype over the total number of individuals (N) per year. Proportions on the y-axes represent the number of individuals of a cytotype found on a particular host over the total number of individuals belonging to that cytotype. Host species (legend, far right) are ground ivy (Glechoma hederacea), wild honeysuckle (Lonicera periclymenum), Salomon’s seal (Polygonatum multiflorum), spindle tree (Euonymus europaeus), and stinging nettle (Urtica sp.). ‘Other’ includes blackberry, stalk rose, elderberry, and at least three different host-species that were not taxonomically identified.
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