A Homemade Mosquito Trap

Simple and easy solutions to a problem as important as mosquito control are not often shared because solutions have focused on chemicals or concepts that can be patented. Unless someone can make a profit from an idea, the public may never become aware of it.
So this idea, found on handimania on facebook, could be useful in Sierra Leone or any area with a mosquito problem.
HOMEMADE MOSQUITO TRAP.

Items needed:

200 ml water
50 grams of brown sugar
1 gram of yeast
2-litre plastic bottle

Or US conversion:
1 cup of water
1/4 cup of brown sugar

HOW:
1. Cut the plastic bottle in half.
2. Mix brown sugar with hot water. Let cool. When cold, pour in the bottom half of the bottle.
3. Add the yeast. No need to mix. It creates carbon dioxide, which attracts mosquitoes.
4. Place the funnel part, upside down, into the other half of the bottle, taping them together if desired.
5. Wrap the bottle with something black, leaving the top uncovered, and place it outside in an area away from your normal gathering area. (Mosquitoes are also drawn to the colour black.)

Change the solution every 2 weeks for continuous control.