Related Clues:
- Shipworms, e.g.
- Damaging insects
- Bugs that live in trees
- Destructive insects
- Destructive bugs
- Insects found in trunks
- Cotton plant attackers
- Cotton pests
- Agricultural pests
- They're penetrating
- Insects make the whole of it, by the sound of them
- For them to be so dull is bad for the drill
- Drill is their work, but it makes them dull
- Wood-damaging insects
- Augers