ELECTROANTENNOGRAM ACTIVITY FROM ANTENNAE OF CERATITIS-CAPITATA (WIED) TO FRESH ORANGE AIRBORNE VOLATILES

Twenty-six compounds have been identified from fresh orange airborne v olatiles, the most abundant being limonene and alloaromadendrene. Ethy l- and butylhexanoates were found in middle concentrations, whereas th e other compounds occur at low levels. Electroantennograms recorded fr om Ceratitis capitata Wied. (males and females) revealed limonene, but yl hexanoate, dihydrocarvone, and limonene oxide to be most active. In the case of dihydrocarvone, 4-ethyl acetophenone, and carvone, female antennae give greater responses than antennae of males. Limonene oxid e was more active for males than females. Total airborne volatiles rec overed from oranges elicited high EAGs, with females being more sensit ive than males.