woodborer

/ˈwʊdˌbɔrər/
noun
  1. An insect or its larva that bores into wood, often damaging trees or wooden structures.
    • Woodborers left tiny holes in the surface of the oak table.
    • The old barn was infested with woodborers that had weakened the beams.
    • Gardeners watch for signs of woodborers in fruit trees to prevent damage.