Insect

Emerald Ash Borer

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). EAB 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
  • 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
Image gallery
Emerald ash borer with penny for scale. Photo by Howard Russell, Michigan State University, via Wikimedia Commons
Emerald ash borer with penny for scale. Photo by Howard Russell, Michigan State University, via Wikimedia Commons
Emerald ash borer with bright green back and coppery red underwings. Photo by Howard Russell, Michigan State University, via Wikimedia Commons
Emerald ash borer with bright green back and coppery red underwings. Photo by Howard Russell, Michigan State University, via Wikimedia Commons
Emerald Ash Borer D-shaped exit holes. Photo by Daniel Herms, The Ohio State University, via Wikimedia Commons
Emerald Ash Borer D-shaped exit holes. Photo by Daniel Herms, The Ohio State University, via Wikimedia Commons
Sap weeping, BSLB damage. Photo by Jon Sweeney, Natural Resources Canada, Bugwood.org
Sap weeping, BSLB damage. Photo by Jon Sweeney, Natural Resources Canada, Bugwood.org
Brown spruce longhorn beetle feeding galleries. Photo by Georgette Smith, Canadian Forest Service, Bugwood.org
Brown spruce longhorn beetle feeding galleries. Photo by Georgette Smith, Canadian Forest Service, Bugwood.org
Brown spruce longhorn beetle. Photo by Georgette Smith, Canadian Forest Service, Bugwood.org
Brown spruce longhorn beetle. Photo by Georgette Smith, Canadian Forest Service, Bugwood.org