Jan 04, 2022 - 07:53 AM
It looks like drywood termite fecal pellets or what is called "frass". There is probably a colony or nest inside this wall. You can either perform a spot treatment using our products or have the home professionally fumigated. You can read more about how to kill drywood termites here - http://www.epestsupply.com/drywood_termites.php.
Hope this helps.