Fig. 2

Orientation of Diadegma semiclausum females to odor pairs presented in a Y-tube olfactometer (% of parasitoids making a selection). The odors presented were intact white cabbage (Brassica oleracea var. capitata) (CA), turnip (Brassica rapa var. rapa) (TU), and broccoli (Brassica oleacera var. italica) (BR). Fifty parasitoids were tested per combination; the number on the bar indicates the number of parasitoids 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