borer
baw rer
- n a drill for penetrating rock
 - n any of various insects or larvae or mollusks that bore into wood
 
- In that tiny package was a noxious pest, the European corn borer.
 - Lydella does no harm to crops and attacks no insect except the corn borer.
 - An indirect effect of this corn stalk utilization is the prevention of pesty corn borer spread.