I am from Dharwad ,Karnataka, Please suggest How to eradicate bed bus from home

Bedbugs can be the hardest insect infestations to get rid of or they can be the easiest, depending on the resources you have available. Some professinals have heaters to raise the temperature in your home to 140 Fahrenheit (60 Celsius), which would make this the easiest way to eliminate them. This is, however, very expensive as the heaters cost several thousands of dollars.

Less expensive but more labor-intensive is to prepare your home for disassembly and have a professional come in to treat every possible hiding place for them. This will involve several hours work by you and then several more by the professional.

Here's a vague idea of the work involved: NCSU Entomology Insect Notes

Eliminating the bugs yourself is going to involve a couple of weeks of intense labor. Diatomaceous Earth is available worldwide and will kill them, but it's action is very slow. Pyrethrin dusts come in different brand names in different places and work much faster, but need to be removed after the infestation is eliminated, as they can trigger allergies in humans.

Liquid sprays and aerosols are pretty much a wasted effort without the specialized training in their use that professionals undergo.