In this episode of Talking Trees, we examine the Emerald Ash Borer (EAB) (Agrilus planipennis), one of the most destructive invasive tree pests worldwide. Originally from Asia, EAB has caused widespread devastation to ash tree populations in North America and parts of Europe.

We explore:

• Life cycle and identification – How to recognize EAB at different life stages and its characteristic signs of infestation.
• Impact on ash trees – How EAB larvae disrupt water and nutrient transport, leading to tree decline and mortality.
• Global spread and invasion pathways – How human activity, including timber trade and firewood movement, accelerates its expansion.
• Control and management strategies – Including biological control methods, chemical treatments, and quarantine measures to slow its spread.

Recent research highlights promising advances in biological control efforts, using parasitic wasps and resistant ash tree species to combat EAB infestations. Join us as we discuss the ongoing battle against this invasive pest and what arborists and forest managers can do to protect ash trees.

Background information:

• Davydenko et al. 2022. Invasion of Emerald Ash Borer Agrilus planipennis and Ash Dieback Pathogen Hymenoscyphus fraxineus in Ukraine - A Concerted Action.pdf
• Emerald ash borer - Wikipedia

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