ADDITIONAL MALE MEDITERRANEAN FRUIT-FLY (CERATITIS-CAPITATA WIED) ATTRACTANTS FROM ANGELICA SEED OIL (ANGELICA-ARCHANGELICA L)

Two sesquiterpene hydrocarbons, beta-copaene and beta-ylangene, were isolated from bioactive fractions of angelica seed oil and were shown by field bioassays to be attractive to the male Mediterranean fruit fly. Their relative attractiveness, compared with the (+)- and (-)-alpha-copaene enantiomers, are: (+)-alpha-copaene > angelica beta-copaene > angelica beta-ylangene > (-)-alpha-copaene. The enantiomer ratios for the two compounds are: beta-copaene, 61.4% (+), 38.6% (-); beta-ylangene, 91.9% (+), 8.1% (-). trans-alpha-Bergamotene was also isolated from the same fractions, but in insufficient quantity for bioassay [enantiomer ratio: 95.7% (+), 4.3% (-)].