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Related Experiment Videos

Essential host plant cues in the grapevine moth.

Marco Tasin1, Anna-Carin Bäckman, Marie Bengtsson

  • 1Chemical Ecology Group, SLU, Box 44, 23053 Alnarp, Sweden.

Die Naturwissenschaften
|February 2, 2006
PubMed
Summary

Grapevine moth attraction is triggered by a specific ratio of three common plant volatiles. This finding aids in understanding plant-insect interactions and developing pest resistance strategies.

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Area of Science:

  • Plant Science
  • Entomology
  • Chemical Ecology

Background:

  • Host plant volatile identification is crucial for understanding plant-insect relationships.
  • This knowledge aids in breeding plants with enhanced insect resistance.

Purpose of the Study:

  • To identify the specific volatile compounds and their ratios that attract the grapevine moth, Lobesia botrana.
  • To understand the chemical basis of host plant recognition in this insect pest.

Main Methods:

  • Gas chromatography-mass spectrometry analysis of grape headspace volatiles.
  • Wind tunnel bioassays to assess olfactory responses of mated female moths to specific volatile blends.

Main Results:

  • A specific blend ratio of (E)-beta-caryophyllene, (E)-beta-farnesene, and (E)-4,8-dimethyl-1,3,7-nonatriene was identified as the attractant.

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  • This blend elicited anemotactic behavior at very low concentrations (nanograms per minute).
  • The identified compounds are ubiquitous plant volatiles, suggesting specificity arises from the blend ratio.

    • Conclusions:

    • Host finding in Lobesia botrana is mediated by a ratio-specific blend of common plant volatiles.
    • This discovery offers potential for novel pest management strategies based on semiochemicals.