How do the host material preferences of ambrosia beetles typically differ from many bark beetles?

Answer

Ambrosia beetles prefer stressed or dead wood, not healthy wood

Ambrosia beetles are commonly associated with wood that is already stressed, recently dead, or seasoned, unlike some pests that attack only live, healthy trees.

How do the host material preferences of ambrosia beetles typically differ from many bark beetles?
Ecologyinsectbeetledistribution