Which description correctly defines Bostrichid powderpost beetles?

Bostrichid powderpost beetles are indeed generally larger than true powder post beetles, which is an important distinguishing feature of this group. Bostrichids are known for their robust bodies, which can be quite noticeable when compared to the smaller size of true powder post beetles. Understanding this size difference is crucial for identification and management purposes, particularly when assessing infestations in various types of wood.

While Bostrichids can cause structural damage, the question specifies a definition and the extent of damage is a broader consequence that does not specifically describe the beetles themselves. The statement about only larvae being capable of damaging wood is misleading, as adults can also contribute to damage indirectly through their behaviors, such as laying eggs. Lastly, the misconception that they exclusively target softwoods is inaccurate; Bostrichid powderpost beetles can infest both hardwoods and softwoods, making their behavior more diverse than just targeting one wood type.

By accurately recognizing that Bostrichids are larger than their true powder post beetle counterparts, pest control professionals can better diagnose and manage wood-destroying pest issues effectively.