Early Detection is a key factor in the effective treatment of Emerald Ash Borer

Presentation about the Emerald Ash Borer to the Hanover Township Committee:

What is an Emerald Ash Borer?

A dark green, metallic bug shaped like a bullet, and it feeds on the leaves of ash trees. The Emerald Ash Borer (EAB) infestation is difficult to detect in the early stages, but the damage can be severe if not prevented properly. EABs were not identified in America until 2002, and has been characterized as the most invasive forest insect to invade North America. Since the discovery of the EAB, it is estimated that the insect has killed hundreds of millions of ash trees.

Native to China, Russia, Japan and Korea, the EAB travelled to North America through wooden packing materials, or imported firewood. Insects that tend to be confused as an EAB are Honey Suckle Flat Headed Borers, Click Beetles, Six-Spotted Tiger Beetles, Green Ground Beetles and more.

What are the signs?

  • Heavily infested trees will display canopy die-back, which is when the top of the tree thins out
  • Yellow or wilted foliage, or decreased density of healthy-looking leaves
  • Many small holes, like ones a woodpecker may impress upon wood
  • Exit holes in the shape of a capital D, creating an emergence hole that is about 1/8 inch in diameter
  • Epicormic sprouting, which is when new growth tries to survive on dead or distressed wood
  • Splitting or cracking of bark

Interesting Facts About the EAB

  • The EAB threatens the source of ash trees
  • The most extensive damage is done during the larva stage(larval), because the EAB larva feeds on tissue in the tree that delivers water and nutrients to the tree
  • Adult EABs begin emerging in Mid-Spring with peak emergence in early to Mid-June
  • About two weeks after emerging, adult female EABs begin to hatch eggs
  • Larva feed for several weeks before entering the Pupal Stage. Once the Pupal Stage is complete, adults begin a new life cycle
  • Adult EABs only live for about three weeks