Figure 4.

The Parasitic Wasp C. marginiventris Is Attracted by (E)-β-Caryophyllene after Previous Oviposition Experience.

Responses of the parasitic wasp C. marginiventris to (E)-β-caryophyllene. The attraction of parasitoid females to a pure standard of (E)-β-caryophyllene was tested in a four-arm olfactometer. Two groups of parasitoids were tested: naive wasps and wasps with a previous oviposition experience on host larvae in the presence of (E)-β-caryophyllene. The parasitoids were tested in groups of six (n = 14). The asterisks indicate a significant preference (P < 0.0001) of experienced wasps for the odor of (E)-β-caryophyllene (black bars) versus pure air (white bars show average preference for one arm). Naive wasps did not show this preference. Means and se are shown.