Almond volatiles attract neonate larvae of <i>Anarsia lineatella</i> (Zeller) (Lepidoptera: Gelechiidae)

Authors

  • Mark Sidney Department of Biological Sciences Simon Fraser University Burnaby, BC V5A 1S6
  • Regine Gries Department of Biological Sciences Simon Fraser University Burnaby, BC V5A 1S6
  • Adela Danci Department of Biological Sciences Simon Fraser University Burnaby, BC V5A 1S6
  • Gary J. R. Judd Agriculture and Agri-Food Canada Pacific Agri-Food Research Centre Summerland, BC VOH 1Z0
  • Gerhard Gries Department of Biological Sciences Simon Fraser University Burnaby, BC V5A 1S6

Keywords:

semiochemicals, β-bourbonene, (EE)-α-farnesene, (E)-β-ocimene, nonanal, decanal, olfactometer bioassay

Abstract

Post-diapause overwintered larvae and neonates of any generation of the peach twig borer, Anarsia lineatella (Zeller), seek suitable sites to bore into and mine tissue of their host plants, including almond and peach. We tested the hypothesis that larvae are attracted to the same almond volatiles that elicit antennal responses from adult moths. Of five candidate almond semiochemicals [β-bourbonene, (E,E)-α-farnesene, (E)-β-ocimene, nonanal, decenal] tested singly or in binary combination (nonanal, decenal) in laboratory Y-tube olfactometers, only β-bourbonene attracted neonate larvae. β-bourbonene in combination with (EE)-α-farnesene was as attractive as the complete almond volatile blend, indicating that they are key semiochemicals for foraging larvae.

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