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. 2012 Aug 17;7(8):e43607. doi: 10.1371/journal.pone.0043607

Figure 2. Proportions (±SD) of female insects choosing oviposition-induced plant volatiles (OIPVs) of B. nigra plants.

Figure 2

Plants were infested with eggs of P. brassicae or M. brassicae. Columns represent arcsine of the proportion of choice for OIPVs by gravid P. brassicae females tested in a flight chamber (dark grey), T. brassicae egg parasitoids tested in a Y-tube olfactometer (light grey), and C. glomerata larval parasitoids tested in a windtunnel (white). All experiments were conducted in a two-choice situation between plants infested with eggs of different ages (24 h, 72 h, 96 h), and clean plants. The dashed line indicates arcsine (0.5)  =  no preference. Numbers below the columns represent the percentage of female insects making a choice. *P<0.05, one-sample t-test. Each treatment combination was replicated with at least four plant pairs. Different phenotypes: Hypersensitive response (HR), HR−: no necrotic zone observed, HR+: necrotic zone.