PLANTÐINSECT INTERACTIONS Volatiles Released From Vaccinium corymbosumWere Attractive to Aegorhinus superciliosus (Coleoptera: Curculionidae) in an Olfactometric Bioassay

The objective of this study was to evaluate the role of host volatiles in the relationship betweenablueberryplantVacciniumcorymbosumL. and the raspberryweevilAegorhinus superciliosus (Guérin) (Coleoptera: Curculionidae), the principal pest of blueberry in the south of Chile. Volatiles from the aerial part of different phenological stages of the host were collected on Porapak Q and analyzed by coupled gas chromatographyÐmass spectrometry (GC-MS). Several chemical groups were identiÞed including green leaf volatiles, aromatic compounds, and terpenes. The olfactometric responses of A. superciliosus toward different odor sources were studied in a four-arm olfactometer. Blueberry shoots at the phenological stages of fruit set, and blue-pink fruit color elicited the greatest behavioral responses fromweevils. Five compounds (2-nonanone, eucalyptol,Rand S-limonene, and 4-ethyl benzaldehyde) elicited an attractant behavioral response from A. superciliosus. The results suggest the host location behavior of A. superciliosus could be mediated by volatiles derived from V. corymbosum. This work has identiÞed a number of compounds with which it is possible to develop a lure for the principal pest of blueberry in southern Chile.