Which specific part of the timber do the damaging larval stages of the deathwatch beetle exclusively feed upon?
Answer
The sapwood
The larvae, which cause the structural damage, reside inside the wood and feed exclusively on the sapwood layer.

Related Questions
What is the primary purpose of the rhythmic ticking or tapping sound made by the deathwatch beetle?What type of wood material is the primary attractant for the deathwatch beetle's life cycle?Which specific part of the timber do the damaging larval stages of the deathwatch beetle exclusively feed upon?What specific environmental condition is critically sought by the female beetle for successful egg-laying?Which hardwood species is considered the most notorious host material for the deathwatch beetle?What is the source of nutrition for the adult deathwatch beetles during their emergence period?Which factor is critical in determining if a female beetle will select a piece of wood for oviposition?If an infestation is established, removing nearby flowering plants will prevent further damage, true or false?Which other hardwoods, besides oak, are frequently targeted by the deathwatch beetle?What is the maximum time frame noted for the deathwatch beetle to develop from egg to adult?