Pests and Diseases

  1. Asian Longhorned Beetle
  2. Emerald Ash Borer
  3. Oak Wilt
  4. Thousand Cankers Disease

The Asian Longhorned Beetle (Anopliphora glabripennis) is a large insect native to Southeast Asia that was first discovered in the United States in the mid 1990’s in New York. The Asian Longhorned Beetle (ALB) has no known natural predators and poses a threat to hardwood forests. This invasive beetle is not a species-specific pest, but targets many different species of trees. 

The Federal government is working in conjunction with local governments and professional arborists to combat it. ALB was successfully eradicated in Illinois and parts of New Jersey, and is currently being controlled in New York and Massachusetts.

Signs of Asian Longhorned Beetle infestation include perfectly round exit holes (about 3/8 to 1/2 inch in diameter) made by adult beetles when they emerge from trees; pockmarks on tree trunks and branches where female deposit eggs; frass (wood shavings and saw dust) produced by larval feeding and tunneling; early fall coloration of leaves or dead branches; and running sap produced by the tree at the egg laying sites, or in response to larval tunneling. Infested trees may also snap or break during high winds due to the wood being weakened by tunneling.  

ALB Resources:

US Department of Agriculture ALB Information