Onion and Calamansi Extract as Cockroach Killer.Docx

Topics: Allium, Onion, Garlic Pages: 5 (1150 words) Published: August 20, 2012
"Onion and Calamansi Extract as Cockroach Killer" 

A. Background of the study 
Cockroaches are one of the most commonly noted pest insects due to their population. More than 3000 species live in tropical regions. They are abundant in and aroud dwellings in temperate areas. Cockroaches are also the hardiest insects on the planet. Some species are capable of remaining active for a month without food or being able to survive on limited resources. Since this insects feed on homan and pet foods they can also serve as vectors for disease transmission.  To control this pests, chemical or synthetic insecticides are usually in many households. This insecticide has many disadvantages because this can pose danger in our environment like air pollution.  This study uses onion nad calamansi extract to control the cockroaches in the house. The extract from onion revealed the presence of propanethial S-oxide and the juice from calamansi contains limonens which can kill insects. 

B. Statement of the Problem 

It especially attempetd to answer the question: 
* Is there any significanct difference between the effectiveness of onion and calamansi extract, and commercial insecticide? 

C. Hypothesis 
* There any significanct difference between the effectiveness of onion and calamansi extract, and commercial insecticide. 

D.Significance of the study 
The result of the study will help the community lessen the number of cockroaches in their houses. This can kill cockroaches that causes and fffood poisoning and allergies to people without buying expensive commercial insecticides. 

E. Definition Of Terms 
Propanethial S-oxide- naturally ocurring chemical containing an atomic arrangement called sulfide group. 

Limonens- a liquid unsaturated hydro carbon that smells like that smells like lemon. 

Chapter II. Review of Related Literature 
Onion is the pungent edible bulb of a cultivated plant related to the lilies. "Onion" is a term used for many plant sion the genus allium. They are known by the common name "onion" but used without qualifiers, it usually refers to Allium cepa. Allium cepa is also known as the garden onion or bulb onion and shallot. The amount of essential oil from onion is very small but it contains the aromatic and tear producing properties. These are caused by sulfide which are produced by the reaction of the enzyme alliinase on an amino acid. These substances are normally is separate cell in the tissues, but when the onion is cut and bruised, rupturing the cells, the reaction take splace. In the late 1970s a chemical was identified as propanethal S-oxide, the onion chemical that makes the people tear-up. Onions are frequently used in science education to demonstrate microscope usage, because they have particualrly large cell which are readily observed even at log magnifications.  Kumquat- Dwarf Calamondin is refereed to as calamansi in the Philippines. It is ornamental bearing heavy crops of small round fruits. the fruit is nearly spherical, with a diameter of 1 mto 1.5 inches. It is apparently native to the Philippine Islands, but is thought by some to be hybrid which arose naturally in China through insect pollination. The oil from the peeling of calamsi contains hexane, an ingredient use in making gasoline. Some species of calamsi has strong insecticidal prosperties. The calamsi is rich in Vitamin C and deodorizing properties too. The tree is widely culitvated in the Philippines and Hawaii and has been introduced to Florida. 

Colliers Encyclopedia 5 

Chapter III. Methodology 
-glass container 
-mortar and pestle 

Take an amount of onion and weigh them. Dlice the onion and pound it with a mortar and pestle. Extact its juice and set it aside. measure an...
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