Which method is typically used for treating subterranean termite infestations?

The treatment of subterranean termite infestations commonly involves creating a chemical barrier in the soil. This method is effective because subterranean termites primarily live in the soil and often enter structures from below ground. By applying a termiticide to the soil, a barrier is formed that prevents termites from accessing the home, either by killing them on contact or through ingestion.

This approach is particularly advantageous because it targets the termites' natural environment, effectively stopping them before they can reach the wooden structures of a building. This method's effectiveness lies in its preventive nature, as it helps maintain a long-term solution against potential infestations.

Other methods, while useful in specific situations, may not address subterranean termites as effectively. Injecting foam into wood is typically more suited for above-ground infestations and might not reach burrowing populations. Heat treatment is generally used for drywood termites and other pests, not specifically for subterranean termites. Using natural predators like nematodes can be effective in some circumstances, but they do not offer the comprehensive control needed for soil-based infestations.