Things You'll Need
Instructions
Cut the top off of an empty two-lieter or three-liter soda bottle. The cut should be made about an inch below the point where the top begins to narrow. Discard the bottlecap.
Cut a piece of mosquito netting or cheesecloth into a square about six inches on a side. Fold the corners together to form a bag, and use a rubber band to secure the bag to the mouth of the bottle top.
Boil two cups of water. Stir in one cup of brown sugar until it completely dissolves. Place the mixture in the refrigerator for several hours to chill.
Mix 1/2 tablespoon yeast into the mixture and pour it into the bottom of the bottle.
Insert the top of the bottle upside down into the bottom of the bottle so that the net bag hangs freely inside the bottle. Secure the bottle top with tape.
Cover the sides of the bottle with black construction paper. Leave the bottle outdoors, preferably near a body of still water. Check the trap twice a day to collect mosquitoes.