What are the primary methods for controlling subterranean and dampwood termites?

C is the correct choice because baiting and insecticides are recognized and effective methods for controlling subterranean and dampwood termites. Baiting systems involve placing bait stations in the ground to attract termites, who consume the bait containing a slow-acting insecticide, ultimately leading to the decline of the termite colony. This method not only targets the worker termites that feed on the bait but also helps eliminate the queen and other reproductive members when they return to the nest.

Insecticides can also be applied directly to infested areas in various formulations, including sprays, foams, and injected solutions, which can effectively kill termites on contact or through ingestion. The advantage of using these methods is that they can be tailored to fit specific infestations and environmental conditions.

The other options, while they may have some relevance to pest control in general, are not effective methods specifically for subterranean and dampwood termites. Traps and repellents may not adequately address the problem, as termites are often hidden in the soil or within wood structures. Fumigation and sealing are more general pest control methods and are often used as last resort approaches rather than primary treatments, which can be costly and impractical for localized infestations. Swatting or killing termites has little effectiveness since