Ordinary table salt is very effective in killing all types of termites. Fill a glass quart jar with salt and add warm water and stir until all the salt is dissolved. You now have a brine solution highly toxic to termites. To apply simply fill a turkey baste syringe with the brine combination and inject solution into easy to reach termite galleys at areas of infestation. The salt sodium will dehydrate the pests naturally.
Regular laundry bleach is also highly lethal to termites. Simply introduce the bleach complete strength into the termite galleys in the same application manner as the salt. For safety use glasses to protect your eyes and dishwashing gloves for hand protection. The bleach immediately chemically burns the termites to death on contact and renders the wood at area treated uneatable to future infestations.
Most households contain an aerosol can product of penetrating oil called WD-40 that has more useful uses than duct tape. WD-40 is highly effective in killing termites. It also comes with a handy applicator straw, which makes it easy to inject the solution into the galleys where the termites live. Apply with straw applicator to termite infestation similar to the application technique explained with the baste syringe. WD-40 is mostly fish oil. It naturally kills the termites by clogging their breathing pores. Additionally it leaves behind a pest repellant residual that is non-toxic to humans.
Long before Dow Jones Chemicals or any commercial exterminators existed, everyday people just like you and I were killing their own termites and other household pests. Today you can nevertheless treat your own termites naturally while saving money and avoiding possible toxic chemical poisoning of your home and family.