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Arthropod-Plant Interactions

, Volume 3, Issue 4, pp 215–224 | Cite as

Airborne interactions between undamaged plants of different cultivars affect insect herbivores and natural enemies

  • Robert GlinwoodEmail author
  • Elham Ahmed
  • Erika Qvarfordt
  • Velemir Ninkovic
  • Jan Pettersson
Original Paper

Abstract

This study investigated the effects of airborne interaction between different barley cultivars on the behaviour of bird cherry-oat aphid Rhopalosiphum padi, the ladybird Coccinella septempunctata and the parasitoid Aphidius colemani. In certain cultivar combinations, exposure of one cultivar to air passed over a different cultivar caused barley to have reduced aphid acceptance and increased attraction of ladybirds and parasitoids. Parasitoids attacked aphids that had developed on plants under exposure more often than those from unexposed plants, leading to a higher parasitisation rate. Ladybirds, but not parasitoids, were more attracted to combined odours from certain barley cultivars than either cultivar alone. The results show that airborne interactions between undamaged plants can affect higher trophic levels, and that odour differences between different genotypes of the same plant species may be sufficient to affect natural enemy behaviour.

Keywords

Aphid Ladybird Parasitoid Volatiles 

Notes

Acknowledgements

This work was financially supported by Mistra through the PlantComMistra program and by the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas).

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Robert Glinwood
    • 1
    Email author
  • Elham Ahmed
    • 1
  • Erika Qvarfordt
    • 1
  • Velemir Ninkovic
    • 1
  • Jan Pettersson
    • 1
  1. 1.Department of EcologySwedish University of Agricultural SciencesUppsalaSweden

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