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April 18, 2026Journal of Forestry ResearchOpen Access

Stem girdling does not allow mimicking changes in Norway spruce tree physiology during Eurasian spruce bark beetle infestation

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Authors

ACAnna CandottiHHHenrik HartmannETEnrico Tomelleri

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Overview

Research uncovers early physiological stress signals in Norway spruce due to bark beetle infestation, indicating significant tree health implications.

Key Points

  • This research aims to identify the early physiological responses of Norway spruce trees to bark beetle infestations.
  • Phloem girdling was performed to attract bark beetles in an alpine forest.
  • Physiological changes were monitored in girdled-infested, girdled-only, and healthy control trees.
  • Key measurements included sap flux density, stem growth, and canopy properties.
  • Cessation of stem growth was the first stress signal observed after infestation.
  • Sap flux density declined by over 40% weeks after infestation began.
  • Girdled-infested trees showed decreased sap flux density correlating with increased vapor pressure deficit.

Cite This Study

Candotti et al. (2026) studied this question.

synapsesocial.com/papers/69e320cc40886becb653fe7ehttps://doi.org/10.1007/s11676-026-02058-3
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