Which of the following is a common method of termite treatment?

Trenching is a widely recognized method of termite treatment that involves digging a trench around the foundation of a building and applying a termiticide. This creates a barrier that deters termites from entering the structure. The trench is filled with the termiticide, which not only targets existing termite colonies but also prevents new infestations.

This method is particularly effective because it directly addresses the soil and subterranean termites, which are the most common type found in many regions, including Arizona. Trenching allows for deep penetration of the treatment into the soil where termites are likely to be present.

In contrast, other treatments such as sealing with plastic, insecticide fogging, or using natural repellents may not provide the same level of effectiveness when it comes to long-term protection or direct treatment of active infestations. Sealing with plastic can help to some extent in reducing moisture and adding a barrier, but does not target existing colonies. Insecticide fogging is generally used for indoor pests and may not be appropriate for termites that primarily reside in the soil or within wood. Natural repellents can deter termites but are often not as reliable or effective as established chemical treatments like trenching.