Treatment & Control of Drywood Termites

Drywood termite control is generally not a DIY project for most homeowners. Baiting, which is effective for some other termites, is not an option because drywood termites never leave the protection of their galleries. Perimeter sprays, that are effective for carpenter ants, won’t work here either. And, treating the soil under and around the structure with termiticide, which is used for subterranean termites, does not work because drywood termites may never contact the soil.

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Limited control can be achieved by treating individual colonies as they are found during, for example, reconstruction or remodelling. These found colonies can be treated by drilling into the wood and injecting insecticide such as Bora Care, Termidor or Premise directly into the tunnels (see Bora Care Insecticide and Termidor Insecticide).

Drywood termite infestations can be prevented by the use of treated or sealed wood. Wood that has been surface-treated with borate, copper-arsenate preservative (“pressure treated”) or painted will stop an initial attack, but cracks or cuts must be retreated.

If the infestation is widespread it may be necessary to “tent and fumigate”. This is an expensive and difficult procedure and is definitely not a DIY project. In the final analysis you may need to hire pest control services to deal with an established infestation of drywood termites.