What visual evidence often serves as the first clear sign of ambrosia beetle infestation on stored wood products?

Answer

Tiny, round exit holes

The tiny, round exit holes are often the first clear sign of infestation, and these are most likely to appear on wood that has been stacked or stored for a few weeks to a few months after being harvested.

What visual evidence often serves as the first clear sign of ambrosia beetle infestation on stored wood products?
Ecologyinsectbeetledistribution