Mean (±SE) quantity (µg) of volatile terpenoids emitted from wood bolts of North American Lauraceae.

Volatiles were isolated from 6 g samples of rasped bark and cambium by super Q collection, and then analyzed by GC-MS (DB-5MS column). Avocado cultivars tested included ‘Taylor’ (Guatemalan race), ‘Duke’ (Mexican race), and ‘Catalina’ (West Indian race).1Mean Kovats Retention Index calculated from 3–10 replicate bolts per species.2Identification by NIST/EPA/NIH mass spectral library (NIST11), then verified by comparison with RI from synthetic chemicals (see text).3Identification by NIST/EPA/NIH mass spectral library (NIST11), then verified by comparison with RI from published reports (see text).