What type of frass sticks together in clumps and is indicative of Bostrichid activity?

The presence of frass that is coarse and packed indicates activity from Bostrichid beetles, which include woodboring beetles known for their destructive feeding habits in wood materials. This type of frass is often composed of a mixture of wood particles, fecal matter, and potentially bits of the beetles themselves, forming dense clumps that point to their presence in wooden structures.

This characteristic is critical for pest control operators as it helps in identifying the specific type of pest and determining the extent of the infestation. Recognizing the distinct nature of frass assists in implementing the most effective control measures tailored for Bostrichid beetles. The other textures of frass mentioned do not correlate with Bostrichid activity; for example, soft and fluffy frass may suggest different pest issues, while pulverized and loose frass typically indicates other wood-boring insect species.