It is just a mix of water, brown sugar and yeast.
- Cut a plastic bottle in half, keep both parts. Can be Coca Cola / Pepsi bottle.
- Take the lower portion of the bottle. Dissolve the brown sugar in hot water. Let it cool down to ~70 deg F.
- Add the yeast. Carbon dioxide will form (This will attract the mosquitoes)
- Cover the bottle with a dark wrap and place the top portion upside down like a funnel. Place it in a corner in your house.
- In 2 weeks you will be surprised by the number of mosquitoes killed. Check this link and this other link.
His seems like a simple and practical way to trap all types of mosquito.We can also do this at the field sites for flood victims medical camps etc. It may also trap flies.