Figure 2

Secretions from the ventral eversible gland (VEG) of Spodoptera exigua caterpillars activate emission of volatile organic compounds (VOCs) in tomato. Figure shows emission of VOCs (expressed as % μg g-1 fwt) by tomato plants damaged by caterpillars with the VEG intact (VEGI), plants damaged by caterpillars with the VEG ablated (VEGA), mechanically injured (MI) plants, and undamaged (control) plants. Data were collected from three plants (i.e. 3 biological replicates) per treatment (see Table 2 for significant differences among treatments).