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Chem. Senses 27: 505-509, 2002
© Oxford University Press 2002

(-)-Germacrene D Increases Attraction and Oviposition by the Tobacco Budworm Moth Heliothis virescens

R. Mozuraitis1,2,3, M. Stranden1, M.I. Ramirez2, A.-K. Borg-Karlson1,2 and H. Mustaparta1

1 Norwegian University of Science and Technology, Department of Zoology, Neuroscience Unit, NO-7489 Trondheim, Norway 2 Royal Institute of Technology, Department of Chemistry, Organic Chemistry, Ecological Chemistry Group, SE-100 44 Stockholm, Sweden 3 Laboratory of Chemical Ecology, Institute of Ecology, Akademijos 2, LT-2600 Vilnius, Lithuania

Correspondence to be send to: Hanna Mustaparta, Norwegian University of Science and Technology, Department of Zoology, Neuroscience Unit, NO-7489 Trondheim, Norway. e-mail: hanna.mustaparta{at}chembio.ntnu.no

The sesquiterpene germacrene D (GD) activates a major type of olfactory receptor neuron on the antennae of the heliothine moths. In Heliothis virescens females, 80% of the recordings have shown activity of one neuron type responding with high sensitivity and selectivity to GD. With the aim of determining the behavioural significance of this sesquiterpene, we have used a two-choice wind-tunnel to study the preference of mated H. virescens females for host plants with and without (-)-GD added. Tobacco plants containing dispensers with low release rate of (-)-GD had a greater attractiveness than tobacco plants without this substance. In addition, a significant increase of oviposition was found on the plants with (-)-GD.


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