We have identified five compounds from the headspace of calling male Mediterranean fruit flies (medfly),
Ceratitis capitata (Wiedemann), and three compounds from the headspace of ripe mango (
Mangifera indica L). using coupled gas chromatographic-electroantennographic (GC-EAG) recordings, coupled gas chromatographic-mass spectrometric (GC-MS) analysis, and electroantennographic (EAG) assays of standards. The male-produced volatiles eliciting responses from female antennae were ethyl-(
E)-3-octenoate, geranyl acetate, (
E,E)-
-farnesene, linalool, and indole. An EAG dose-response test of linalool enantiomers and indole with female medfly antennae showed relatively strong EAG activities, but no significant difference between (
R)-(-)-linalool and (
S)-(+)-linalool. The three mango volatiles were identified as (1
S)-(-)-
-pinene, ethyl octanoate, and
-caryophyllene. In addition, a strong antennal response was recorded from a contaminant,
-copaene, present in a commercial sample of
-caryophyllene. The EAG response amplitudes from both male and female antennae to the above three mango volatiles were significantly greater than to a hexanol control. For both male and female medfly antennae, the greatest EAG responses were elicited by
-caryophyllene followed by ethyl octanoate. The mean EAG responses of female antennae to
-caryophyllene and (1
S)-(-)-
-pinene were significantly greater than those of male antennae.
相似文献