Which treatment type is generally used to control termite population growth?

In the context of controlling termite populations, an insect growth regulator (IGR) is specifically designed to disrupt the developmental processes of pests, including termites. IGRs function by interfering with the hormones that control growth and maturation in insects, preventing them from reaching maturity or reproducing. This makes them an effective method for managing termite populations over time, as they reduce the number of new termites that can contribute to the colony's growth.

In contrast, options such as repellent termiticides and soil barriers primarily aim to prevent termites from entering a structure rather than directly reducing their populations. While direct applications can kill existing termites, they do not address the lifecycle and reproductive capabilities of the colony. IGRs offer a unique approach by targeting and disrupting the life cycle of termites, providing a sustainable solution for long-term control of infestations.