“…Also the pink bollworm moth, Pectinophora gossypiella, one of the major pests on the β-caryophyllene rich cotton plants, has specific ORNs with high sensitivty to β-caryophyllene (Tömmerdal, 1995). In other studies, the use of gas chromatography linked to electrophysiology has been attempted to test single ORNs in oligophagous and polyphagous species for, in principle, all of the naturally produced constituents in the relevant plants (Blight et al, 1995;Wibe & Mustaparta, 1996;Wibe et al, 1997;Rostelien et al, 2000a,b;Stranden et al, 2002) Stensmyr et al, 2001Barata et al, 2002). Interestingly, in two beetle species (Hylobius abietis and Phoracanta semipunctata) considered as oligophagous, many different ORN types have so far been identified that respond to compounds common in many plants.…”