logo150 Hamilton County Soil & Water Conservation District  

Emerald Ash Borer

Hamilton County Distribution

  • No confirmation in Hamilton County
  • Confirmed in many counties in New York State
  • Distribution map


  • Insect
  • Metallic green adults are 0.5 inches long
  • D-shaped exit holes in tree bark
  • Woodpecker damage


  • Without the ecological checks and balances found on their home turf, they rapidly reproduce
  • Larvae feed on the tree’s living tissue, cutting off the tree’s food and water transportation systems
  • With aggressive infestations, trees can die in a few years
  • Host tree species include all ash species including white, green, and black


  • Insecticides
  • Biocontrol is being researched
  • Slow the spread and don’t move firewood

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The District’s accomplishments would not be possible without the support of the State of New York, Hamilton County, and FLLOWPA.