Which treatment method is often effective against subterranean termites?

Soil treatment with termiticides is an effective method for controlling subterranean termites because these pests typically live underground and can establish nests in the soil or in wooden structures that come in contact with the ground. By applying termiticides to the soil around and beneath a structure, a barrier is created that repels or kills termites that attempt to enter the building. This method directly targets the termites' habitat and prevents infestations before they can occur, making it a proactive approach to pest management.

In contrast, aerial sprays are generally ineffective against subterranean termites since they do not reach the areas where these termites live and thrive. Wood surface treatments may kill termites present on the wood surfaces but do not address those that are already in the soil. Natural repellents may offer some protective qualities, but they do not provide the same level of efficiency or longevity compared to chemical termiticides specifically designed for soil treatment. Therefore, using soil treatment with termiticides is widely regarded as the most effective method for managing subterranean termite populations.