08/19/2026
The USDA deemed August as Tree Check Month for Asian Longhorned Beetle.
The ALB is an invasive wood-boring beetle that attacks 12 types of hardwood trees. The insect prefers maple trees, but it also likes to attack birches, buckeyes, elms, and willows. Sometimes it attacks ash, golden rain tree, katsura, London plane tree, mimosa, mountain ash, and poplar. Infested trees become safety hazards. Branches can drop and trees can fall over, especially during storms.
Signs that a tree might be infested include:
- Round exit holes in tree trunks and branches about the size of a dime or smaller.
- Egg sites, or chewed spots, on the bark about the size of a quarter. Sap may weep out from these.
- Sawdust-like material called frass found on the tree, ground, or tree branches.
- Branches or limbs dying or falling from an otherwise healthy-looking tree.
Report any sightings on iMapInvasives, the state used database for invasive species management.
Please do not transfer firewood as this is the leading cause in it's spread.