Termites can be controlled by filling cracks and crevices of buildings and human dwellings with chloro-pyrivos. In field by irrigation specially sprinkling method and by destructing termeteria.
The two methods considered to be most eco-friendly nowadays are dusting and baiting, both trap and treat methods. The professional systems include: Sentricon® by DowAgrosciences, FirstLine® by FMC, Exterra® by Ensystex, Zyrox® by Syngenta, Nemesis® by PCT International, Subterfuge® and Advance® by BASF, Xterm® by Sumitomo, and others. I don't know about the availability of these products in India, but a quick Google search found various references to other baiting systems.