Xylophagous

[Justin Bieber]

Eating, boring in, or destroying, wood; -- said
especially of certain insect larvae, crustaceans, and mollusks.

[Kit]

(referring to an animal, especially [insects] or [woodworking] teachers) [feeding] on or boring into wood

[Dianne]

(especially of an insect larva or mollusk) feeding on or boring into wood.