(Agrilus planipennis)

Name and Family

Emerald Ash Borer (Agrilus planipennis)


The Emerald Ash Borer was brought to North America from Asia. It was first detected near Detroit, MI and in Windsor, ON in 2002. It likely arrived in wood packaging material in the early ’90’s. Since then it has spread to 15 U.S. states, across Southern Ontario and into Quebec. EAB has not yet been detected on PEI.

Identification Guide

  • Adult beetles are bright metallic green, with a coppery-red back (under wings)
  • Typically 8.5mm long and 1.6mm wide
  • Eggs are 0.6 – 1.0mm wide, and are initially white but later turn reddish-brown if fertile
  • Eggs are deposited between bark crevices, flakes or cracks, and hatch two weeks later
  • Adults create a D-shaped hole when exiting tree

What it does in the ecosystem

The Emerald Ash Borer (EAB) is an invasive beetle that attacks and kills all species of ash trees, except mountain ash (which is not a true ash species).


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