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Herbivore-induced Blueberry Volatiles and Intra-plant Signaling
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Aboveground and Belowground Insect Herbivory Changes Maize-Wireworm Interactions via Root Volatile Cues.

Diego M Magalhães1, Gareth A Thomas1, Oliver Clark-Hattingh1

  • 1Rothamsted Research, Harpenden, UK.

Plant, Cell & Environment
|April 29, 2026
PubMed
Summary
This summary is machine-generated.

Plant roots release small lipophilic molecules (SLMs) that attract soil pests. Dual herbivory, affecting both above and belowground plant parts, significantly increases SLM attraction for Agriotes wireworms.

Keywords:
attractant blendbelowground plant‐insect interactionfield experimentherbivore‐induced plant volatilesrhizosphereroot volatilessmall lipophilic moleculessoil chemical ecology

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Area of Science:

  • Agricultural Entomology
  • Chemical Ecology
  • Plant-Insect Interactions

Background:

  • The rhizosphere is a key zone for plant-herbivore interactions, often regulated by small lipophilic molecules (SLMs).
  • Chemically mediated belowground crop-pest interactions are poorly understood, despite the agricultural significance of soil insects.
  • Above and belowground herbivores can alter host plant chemistry, impacting interactions across trophic levels.

Purpose of the Study:

  • To investigate the impact of single and simultaneous herbivory on the olfactory orientation of Agriotes wireworms towards maize roots.
  • To determine how different herbivory combinations influence the SLM profiles of maize plants.
  • To assess the attractiveness of herbivore-induced SLM blends in semi-field and field conditions.

Main Methods:

  • Combined laboratory, semi-field, and field experiments.
  • Analyzed SLM profiles under different herbivory treatments (single and dual).
  • Assessed wireworm olfactory orientation towards maize roots.
  • Tested the attractiveness of a synthetic SLM blend mimicking dual herbivory.

Main Results:

  • Distinct SLM profiles were observed for different herbivore combinations.
  • Wireworms showed the highest attraction to roots of plants experiencing dual herbivory (wireworms + Ostrinia nubilalis larvae).
  • A synthetic SLM blend, characteristic of dual herbivory, proved attractive in semi-field and field settings.

Conclusions:

  • Systematically induced SLMs play a crucial role in shaping interactions between generalist belowground pests and host plants.
  • Dual herbivory significantly enhances the attractiveness of maize roots to Agriotes wireworms via altered SLM production.
  • Understanding these chemically mediated interactions is vital for developing sustainable pest management strategies.