How does the availability of host plants differ fundamentally between Europe and North America regarding this pest?

Answer

North America has no native boxwood species, confining hosts to ornamentals.

There are no boxwood species native to continental North America, meaning the moth’s host plants are confined only to those intentionally planted as ornamentals, unlike in parts of Europe where wild boxwood stands act as pathways.

How does the availability of host plants differ fundamentally between Europe and North America regarding this pest?
rarityinsectmothTreepest