Mosquito repellents whcih are available are harmful to health.
Try this one.
2.Take the lower portion of the bottle. Dissolve the brown sugar in hot water.
Let it cool down to ~70 deg F.
3.Add the yeast. Carbon dioxide will form(This will attract the mosquitoes)
4.Cover the bottle with a dark wrap and insert in the top portion upside down like a funnel. Place it in a corner in your house.
5. In 2 weeks you will be surprised by the number of mosquitoes killed.
- Brazil to breed GM mosquitoes to combat dengue (thehimalayantimes.com)