However, if you are adamant about going for a DIY, here are a few measures that might probably work out for you.
Orange Oil
Obtained from orange peels, orange oil contains an active substance called D-Limonene which can kill a wide range of insects by destroying their exoskeleton and cell membranes. Drill tiny holes into the suspected areas and inject a small amount of orange oil in each of them. Results may start to become conspicuous after a few days or even a couple of weeks.
Electrocution
This is another effective method to get rid of termites. Purchase an electric device and electrocute the pests through pre-drilled holes.
Sunlight
If the high activity areas of termites are wooden furniture pieces, then this trick can be what you are looking for. Take the furniture outside and place in a spot receiving direct sunlight. Because termites prefer moisture and darkness, the heat and light will definitely kill them.
Microwaves
Buy a portable microwave device and treat the infested areas for about 10 minutes. A couple inches of wooden board may require treatment for around 30 minutes or more than that.
Nematodes
Nematodes are tiny worms, that look for hosts and burrow into their bodies, killing them within an approximated duration of 48 hours. They are generally not a threat to plants, animals or pets, and are capable of destroying entire colonies of termites as well. Buy some nematodes from a local home improvement shop and spray them in the activity ground of the wood borers.
Cardboard Trap
You can even use cardboard as an excellent bait for termites. Take a few sheets of cardboard, pile them on top of each other and spray them with a little bit of water. Place them in the infested areas and when they are full of the pests, take the bait outside and simply incinerate as many times as needed.
Although the above mentioned tricks may just work, but full-blown infestations can be really difficult to tackle without the help of a professional firm dealing with termite control in Central Coast.