Function

• Termite frass is used by termites to feed larvae. This introduces wood-eating bacteria into the larvae digestive system. Termite frass is full of decomposing wood fibers that can eventually become soil.
  
  

Extermination

• Checking for fresh termite waste is a good way to see if an extermination program has worked. Removing the frass daily and not finding any for a week is a good indication that the colony is dead.
  
  

Types

• Subterranean termites, or those that live underground, excrete round pellets. Drywood termites have frass that resembles sawdust. Neither is toxic.