Emerald Ash Borer Biology and Management Strategies

The emerald ash borer (Agrilus planipennis) is an invasive wood-boring beetle native to East Asia that has caused widespread ash mortality in North America and poses a growing threat in Europe. Adults emerge in spring, feed on foliage and oviposit in bark crevices, while larvae tunnel through phloem and outer sapwood, disrupting nutrient transport and girdling trees. The pest is typically univoltine, with larvae overwintering beneath the bark. Detection relies on visual surveys, bark peeling and trap networks baited with host volatiles. Management strategies encompass chemical treatments, systemic insecticides and pheromone- or kairomone-based trapping, alongside classical biological control using introduced parasitoid wasps. Silvicultural approaches include resistance breeding informed by genomic and transcriptomic studies, salvage harvesting, and forest composition adjustments. Landscape-scale modelling of dispersal underpins quarantine planning and early-warning systems. Integrated pest management combines monitoring, targeted treatments and habitat-based measures to slow spread and protect high-value stands. Global significance arises from the potential loss of ash species in urban, riparian and forest ecosystems, with cascading effects on biodiversity, water regimes and cultural landscapes.

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Emerald Ash Borer Biology and Management Strategies publication trend

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Technical terms

Univoltine: Species producing one generation per year.

Phloem: Living tissue in the inner bark that transports sugars and other metabolic products.

Classical biological control: Introduction of specialised natural enemies to suppress an invasive pest.

Ecohydrology: Study of interactions between hydrological processes and ecosystem structure and function.

Girdling: Removal or simulation of bark strips around a stem to disrupt transport tissues or mimic pest damage.

References

1. Transcriptome profiling of Fraxinus excelsior genotypes infested by emerald ash borer. Scientific Data (2023).
2. Progress and Challenges of Protecting North American Ash Trees from the Emerald Ash Borer Using Biological Control. Forests (2018).
3. Forested versus herbaceous wetlands: Can management mitigate ecohydrologic regime shifts from invasive emerald ash borer?. Journal of Environmental Management (2018).