Journal of Chemical Ecology

, Volume 20, Issue 8, pp 1813–1823

Olea europaea chemicals repellent toDacus oleae females

  • R. Lo Scalzo
  • M. L. Scarpati
  • B. Verzegnassi
  • G. Vita

DOI: 10.1007/BF02066224

Cite this article as:
Lo Scalzo, R., Scarpati, M.L., Verzegnassi, B. et al. J Chem Ecol (1994) 20: 1813. doi:10.1007/BF02066224


The egg dispersion strategy of the olive fruit flyDacus oleae, which is dependent on chemicals from the fruit, was investigated. In particular, the exact role ofo-diphenolic compounds, such as the typical olive glucosides, oleuropein and demethyloleuropein, and their derivatives was clarified. It appears that the strong chemotactile repulsive effect exerted by the water fraction of crushed olives is due mainly to (E)-2-hexenal. Several compounds, such asβ-3,4-dihydroxyphenylethanol and other oleuropein derivatives, which exert a strong chemotactile repulsion, were newly identified or confirmed either in fresh olive juice or in olive mill waste water. This result confirms that the small droplets of olive juice, regurgitated just after egg laying by theD. oleae female all around the oviposition hole, actually prevent other females from ovipositing on the same fruit.

Key words

Olea europaea chemotactile repellents Bactrocera (Dacus)oleae Diptera Tephritidae oviposition behaviour oliveo-diphenolic compounds 
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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • R. Lo Scalzo
  • M. L. Scarpati
    • 1
  • B. Verzegnassi
  • G. Vita
    • 2
  1. 1.Department of ChemistryUniversity “La Sapienza”RomeItaly
  2. 2.ENEA Biotechnologies ProjectItaly

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