Do you see white powder in your wooden cupboards and drawers everyday, which comes back the very next day even if you clean it? If yes, then most likely you have a problem of borer. Powder Post Beetle is commonly called Wood Borer. They are very destructive and reduce precious wood into dust.
Wood Borers are about 4mm long and dark brown to black in colour. They spend their life in wood. And thus they live in their food.
They lay eggs in cracks/pores in wood. Life cycle of the insect is unlike animals or human beings. The egg hatch to become larva, then pupa and finally the adult. The larva starts eating voraciously on wood thereby making tunnels inside wood.