Help identify wood eating bugs

[Stephen Hoang]

Hello,

I bought a house and while doing renovation I started seeing along the bottom  edge of a couple walls appear a muddle of coarse powdery subtance like sands.  I think it's a residue of wood eating bugs.  Just wondering what it is, and whether or not I can treat this myself or better to call pest control company.

Attached is the picture I took.  Thanks in advance for helping.

Stephen.