What is a key treatment method recommended for controlling drywood termites?

Fumigation is a key treatment method for controlling drywood termites because it involves sealing the entire structure and introducing a gas that penetrates all wood and hidden spaces, effectively eliminating the termites. This method is particularly effective for drywood termites, as they can inhabit and infest the wood within a structure, creating colonies that may not be visible from the surface. The effectiveness of fumigation lies in its ability to reach every area of the infestation, including the hardest-to-reach places, ensuring comprehensive treatment compared to localized methods.

Other treatment methods, while useful for different types of termite infestations, do not provide the same level of coverage for drywood termites. Soil treatments and liquid barrier treatments are generally more suited for subterranean termites and may not be effective against drywood termites that live above ground. Spot treatments can target localized areas but may not address the broader infestation present in a drywood termite colony, making fumigation the most reliable choice in these scenarios.