What method is used for localized treatment of drywood termites when removal is impractical?

The use of an insecticide that can be injected into termite galleries is a practical and effective method for localized treatment of drywood termites, especially when removal of infested wood is not feasible. This approach allows pest control professionals to deliver a specific treatment directly into the areas where termites are present, targeting them effectively without the need for extensive structural modifications or demolition.

By injecting the insecticide into the galleries, it reaches the termites where they reside, potentially eliminating them quickly and efficiently. This method is advantageous because it minimizes collateral damage to the surrounding structures and can often be performed in a less invasive manner than other treatments.

In contrast, wood treatment with heat can be effective but may not always be practical, especially for larger structures or intricate woodwork. Fumigation is indeed a highly effective method for severe infestations but is generally more invasive and costly, often requiring the entire structure to be tented. Sealing the wood with paint might provide some barrier against environmental factors, but it does not effectively eliminate existing termite populations or prevent future infestations. Therefore, focusing on the direct treatment through insecticide injection is often the preferred approach when dealing with localized infestations of drywood termites.