When treating for subterranean termites at a property with an accessible crawl space, where should treatment be directed?

When treating for subterranean termites in a property with an accessible crawl space, treatment should be directed toward piers, floor beams, interior stem walls, and exterior stem walls. This focus is crucial because subterranean termites typically live in the soil and can easily access wooden structures above ground by tunneling through the soil to reach these key structural components.

Piers and floor beams provide critical support and are often made of wood, making them prime targets for termite activity. Interior stem walls are also important since they provide a barrier between the interior of the building and the earth, where termites may enter from outside. Treating these areas is essential to disrupt potential termite pathways and create a protective barrier against an infestation.

While other options may seem relevant in the context of pest management, they do not specifically target the structural elements of a building that are most vulnerable to subterranean termites. Focusing treatment on these structural components ensures that the areas where termites are likely to infest are adequately protected and treated, significantly reducing the risks of damage from this destructive pest.