Property owners often miss the telltale signs—tiny piles or dustings of substances that resemble sawdust, powder, granules or mud. Closer inspection above or immediately at the site may reveal, however, a single hole, dozens of holes or decay that is more difficult to detect—each type of damage evidence of a nest, a colony and a potential infestation. The frass present at each site is often the key to identifying what type of pest might be at fault.
What Is Frass?
In the strictest, most technical use of the word, frass is the excrement of insects and their larvae. In some cases, frass leavings alone are present while in other cases, frass may be mixed with sawdust that the insects have chewed or reused to appear like mud, for example.
How To Identify Frass
Many insect pests have distinctive frass. Here are some of the most common ones.
Carpenter Ants: Cone-shaped piles...