Which fumigants are commonly used for termite control?

The correct choice highlights the use of sulfuryl fluoride and methyl bromide as commonly employed fumigants for termite control. Sulfuryl fluoride is particularly effective for structural fumigation, serving to eliminate termites in buildings and structures effectively due to its ability to penetrate wood and other materials where termites may reside. Methyl bromide, while less commonly used today due to environmental concerns, has historically been a powerful fumigant effective against a wide range of pests, including termites.

Other options present substances that are either not primarily utilized for fumigation or are more suitable for different types of pest control. For instance, boric acid is used more as a surface treatment and less as a fumigant, while chlorpyrifos and diazinon are considered residual insecticides and are typically applied as sprays rather than through fumigation methods. Similarly, deltamethrin and permethrin are insecticides that are utilized for contact or residual control, not as gaseous fumigants. Thus, sulfuryl fluoride and methyl bromide stand out as the preferred choices for fumigating structures infested with termites.