Fig. 1

Orientation of P. xylostella females to odor pairs presented in a Y-tube olfactometer (% of moths making a selection). The odors presented were intact white cabbage (Brassica oleracea var. capitata) (CA), yellow rocket, (Barbarea stricta) (BA), turnip (Brassica rapa var. rapa) (TU), and broccoli (Brassica oleracea var. italica) (BR). Fifty to fifty-four moths were tested per combination; the number on the bar indicates the number of moths that selected that odor source. The number in parentheses is the number of individuals not making a selection. Asterisks indicate a significant difference tested with GLMM). *P < 0.05 and **P < 0.001