I.

ABSTRACT

Dengue virus is the cause of dengue fever and mosquitoes are considered as carriers. Many

measures have been tried for mosquito control, including the elimination of breeding places, exclusion

via window screens and mosquito nets. While mosquitoes are useful for the ecosystem (did you know

that mosquitoes are the main cocoa plants pollinators? No mosquitoes means no chocolate), we don't

want them to fly around our garden and bite everything that's alive, pets included.

One of the best ways to keep a yard clear of biting mosquitoes is to use a mosquito trap. When

set up properly, just one or two of these ingenious devices can kill thousands of mosquitoes and all but

wipe out a local population. You can easily reduce the number of mosquitoes on your property with a

plastic bottle trap with yeast that will attract and kill the mosquitoes. The liquid in each trap will last

about two weeks, and then, it can be easily replaced.

The carbon dioxide that we exhale through normal breathing attracts mosquitoes, and this

simple mosquito trap produces CO2 to lure and capture the bugs. Once inside the trap and unable to

find a tasty meal, the mosquitoes look for the exit and fly up along the insides of the bottle. With their

escape route blocked, the bugs eventually tire out and fall to the bottom of the trap to die. When done
with the trap, the bottle is recyclable. For increased effectiveness, place multiple traps around your

house or property.

II. INTRODUCTION

Mosquitoes, as well as its larvae, are important food for aquatic animals such as birds, bats, and

other arthropods. However, mosquitoes transmit pathogens that cause some of the worst diseases

known, including malaria, yellow fever, encephalitis and most of all, dengue fever. Sugars are the

smallest carbohydrates containing five to six carbon atoms, hydrogen, and oxygen. Saccharomyces

cerevisiae, commonly called yeast, is a single-celled organism that feeds on glucose, and through

fermentation converts carbohydrates to alcohols while releasing carbon dioxide (CO2). Carbon dioxide is

attractive to mosquitoes. Therefore, solution containing sugar and yeast can be used as baits.

III. STATEMENT OF THE PROBLEM

This study determined the effectivity of yeast and brown sugar in making a mosquito trap;

specifically it seeks to answer the following questions:

1. Are there any effective results that there will be mosquitoes trapped?

2. Are there any differences between the experimental studies compared to the commercial

ones?

IV. OBJECTIVES

1. To determine the effectiveness of CO2 generated by yeast in brown sugar as bait for a

mosquito trap.

2. To determine the differences of using the mosquito trap from yeast and sugar from the

commercial ones.

V. HYPOTHESES
 1. There is no effectiveness of CO2 generated by yeast in brown sugar as bait for a mosquito

trap.

2. To determine the differences of using the mosquito trap from yeast and sugar from the

commercial ones.

VI. SIGNIFICANCE OF THE STUDY

The importance of this study is that it can be used to kill mosquitoes in our house or anywhere,

and prevent the insect borne diseases like malaria, yellow fever, and dengue fever. It is not harmful to

our health because it is environment friendly.

V. METHODOLOGY

Materials

 An empty, plastic 2 liter bottle

 A marker or pen

 A box cutter

 A tape measure

 1/4 cup brown sugar

 1-1 1/3 cup hot water

 1 gram of yeast

 Measuring cup

 Tape (duct, scotch, or electrical are fine)

Procedure

1. Make a mark halfway down the plastic bottle. About 4 inches (10 cm) from the lid of the

2 liter bottle is about half of the bottle. You can use a ruler or measuring tape to find

where 4 inches down the bottle is.

2. Draw a circle around the bottle 4 inches from the lid. You will be cutting the plastic

bottle in half. The measurements here do not need to be exact, but drawing a marked

guide line will be helpful. Using the pen mark you just drew as a guide; draw a circle
 around the bottle 4 inches down from the lid. This will guide you in cutting the bottle in

half.

3. Cut the plastic bottle in half. Cut carefully along your marked guide line until the bottle

is in two sections. Keep both parts of the bottle; you'll use them both to make the trap.

4. Measure 1/4 cup of brown sugar. Use your measuring cup to measure out 1/4 cup of

brown sugar. Leave the sugar in the measuring cup; you will pour it into the bottle in the

next step.

5. Heat up 1-1 1/3 cup of hot water. You can heat up the water over the stove or in the

microwave, whichever is more convenient. When the water begins to steam, it is hot

enough for the trap.

6. Pour the hot water into the lower half of the bottle. Pour the water slowly; since it is

hot, you do not want to splash any water because it could burn you.

7. Pour the brown sugar into the lower half of the bottle. Carefully pour the brown sugar

from the measuring cup into the lower half of the bottle.

8. Allow the mixture to cool. Set the bottle aside for however long it takes the hot water to

cool. Twenty minutes should be long enough.

9. Add 1 gram of yeast to the plastic bottle. You don’t have to stir the mixture together.

The yeast will consume the sugar and produce carbon dioxide, which attracts the

mosquitoes.

10. Hold the top half of the bottle upside down. The lid of the bottle will be facing

downwards at this point. While you are holding the top half of the bottle upside down,

grab the bottom half with your other hand.

11. Place the top half upside down inside the bottom part of the bottle. Push the top inside

gently until the cut edges align. Ensure the top of the bottle is above the water line.

12. Adult mosquito should have enough room to fly in the bottle and down the lid.

13. If there is not enough room for them to fly in the bottle, empty a bit of the solution out.

14. Now, insects can fly into the trap and die from suffocation or starvation.
 15. Secure the edges with tape. Use tape to keep the edges aligned. A few pieces of tape

placed around the bottle will suffice to keep the edges in place.

VII. RESULTS

The yeast and the brown sugar comes into play. Activating the yeast and giving it a food source

(the brown sugar water mixture) stimulates the yeast to grow and multiple - giving off carbon dioxide in

the process. Hungry mosquitoes follow the CO2 trail into the bottle and down through the funnel. But

when their tiny insect minds realize that there's no food to be found, they typically fly along the surface

of the brown sugar mixture until they reach the sides of the bottle. The bugs then fly up the side of the

bottle but their escape is blocked by the inverted funnel (the reason for sealing the edges with duct

tape). The little biters are trapped!

VIII. CONCLUSIONS

Mosquitoes are attracted by carbon dioxide. As we exhale, we expel carbon dioxide vapor.

Mosquitoes follow vapor trails of CO2, knowing that a fresh meal of warm blood is at the other end. So

to attract mosquitoes and to entice them to enter our trap, we need a source of carbon dioxide.

Therefore, the carbon dioxide generated by yeast in brown sugar is effective as bait for a mosquito trap.

Also, this kind of mosquito trap is different from those commercial ones because it is easy to make from

inexpensive materials and ingredients. No special tools are needed. This mosquito bait is organic and

can be used safely around pets and children.

IX. RECOMMENDATION

This simple homemade mosquito trap will not capture and kill all of the mosquitoes in your yard

nor eliminate the risk of being bitten. To increase effectiveness and to see the best result of this project,

place multiple traps around your house or property or try combining the mosquito traps with other

methods of mosquito control.

X. BIBLIOGRAPHY

 Kline D.L. 2006. Traps and trapping techniques for adult mosquito control. Journal of the

American Mosquito Control Association 22: 490-496. Retrieved from

971X(2006)22%5B490%3ATATTFA%5D2.0.CO%3B2

 Russell, R.C. 2004. “The relative attractiveness of carbon dioxide and octenol in CDC- and

EVS-typelight traps forsampling the mosquitoes Aedesaegypti (L.), AedespolynesiensisMarks,

and Culex quinquefasciatus say in Moorea, French Polynesia. Journal of Vector Ecology. 2004

Dec; 29(2):309-14. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/18666533.

 Henderson, J. P., Westwood R., and Galloway T. 2006. An assessment of the effectiveness of

theMosquito Magnet Pro model for suppression of nuisance mosquitoes. Journal of the

AmericanMosquito Control Association. 22 (3): 401-407.