Compounds from host fruit odor attractive to adult plum curculios (Coleoptera : Curculionidae)

Three release rates of each of 30 compounds identified as components of the odor of unripe host plum or apple fruit were evaluated in field tests in 1 999 for attractiveness to adult plum curculios, Conotrachelus nenuphar (Her bst). Compounds were introduced into polyethylene vials and assayed in asso ciation with bell weevil traps placed beneath infested apple trees in Ohio and Massachusetts. Results confirmed previously reported attractiveness of limonene and ethyl isovalerate to this insect. In addition, at least six ot her compounds showed good evidence of attractiveness (benzaldehyde, benzyl alcohol, decanal, E-2-hexenal, geranyl propionate and hexyl acetate), and f ive other compounds appeared worthy of further evaluation for attractivenes s (2-hexanol, I-pentanol, 2-pentanol, phenylacetaldehyde and 2-propanol). D egree of attractiveness of compounds varied according to release rate.