Electroantennographic responses and field attraction to peach fruit odors in the fruit-piercing moth, Oraesia excavata (Butler) (Lepidoptera: Noctuidae)

Ruilin Tian, Yohei Izumi, Shoji Sonoda, Hideya Yoshida, Takuma Takanashi, Kiyoshi Nakamuta, Hisaaki Tsumuki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The olfactory responses of adult males and females of the fruit-piercing moth, Oraesia excavata, to lactones as specific components among ripe peach fruit odors were recorded by electroantennogram (EAG) techniques and trap captures in the field. Six lactones (γ-hexalactone, γ-octalactone, δ-octalactone, γ-decalactone, δ-decalactone and γ-dodecalactone) and a green leaf volatile compound (cis-3-hexen-1-ol) as the reference compound for normalization were used to measure EAG responses. The EAG response to γ-hexalactone, shown to be the highest among the six lactones tested, did not reach as high as that to a mixture of five lactones when 10% concentrations (v/v) of the lactones were used. There was no significant difference between males and females in EAG responses to those compounds. In the field experiment, the number of moths captured by traps baited with a mixture of the five lactones (γ-hexalactone, γ-octalactone, γ-decalactone, δ-decalactone and γ-dodecalactone=142 : 7 : 145 : 70 : 28, v/v) was about half that captured with ripe peach fruit; however, the moths were not captured by traps with individual lactones. These results show that O. excavata is attracted by a mixture of lactones, but not by individual lactones, although individual lactones are recognized by antennal receptors.

Original languageEnglish
Pages (from-to)265-269
Number of pages5
JournalApplied Entomology and Zoology
Volume43
Issue number2
DOIs
Publication statusPublished - Sep 3 2008

Keywords

  • Attractant
  • Electroantennogram
  • Lactone
  • Oraesia excavata
  • Peach fruit odor

ASJC Scopus subject areas

  • Insect Science

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