Investigatory Project

Topics: Garlic, Capsaicin, Scoville scale Pages: 7 (1609 words) Published: May 20, 2011

Nowadays ,people can’t oppose the boosting of the countless pests and insects that disturb our daily habits. Controlling of insects and pests is one of the main problems of most farmers and gardeners. So, instead of buying commercial and expensive inorganic insecticides, an alternative and economical insect repellant made up of the sap of euphorbia plant, garlic, and siling labuyo, all natural insecticides derived from different plants which could kill insects and pests. The garlic (alluim sactium) that used for both ordinary and medicinal purposes and even as natural flavoring, could also be a benefit to make an insecticide. The property of garlic that is considered as an effective chemical that can kill insects and pests is its ALICIN, it is not seen in its natural state but when shopped and crushed, the enzyme ALLINASE acts on the chemical ALLIIN converting it to ALLICIN. ALIIN is an amino acid that doesn’t build proteins. Thus, it could kill insects because of its smell which humans dislike too. Furthermore, the garlic helps the insecticide to be more secure and natural. For the siling labuyo(capsicum annuum)which can be purchased at any markets, was also proved to an efficient ingredient in making an insect repellant. It has an active component known as CAPSAICIN . It was said to be an irritant for animals that causes a perception of burning of tissues. Capsaicin is the primary ingredient of pepper sprays. While in the other hand, the sap of euphorbia plant (euphorbia leucocephala), a cactus-like plant with spiny and succulent stems and flowers that are solitary, short and colorful. Base from the researchers, the euphorbia plant has a poisonous principle in all parts and it can be an active component in making an insecticide because it’s high toxicity. It may intense inflammation of the skin and eye to the person or animals that will be affected by this.


1. Yield an alternative and economical insect repellant made up of the sap of euphorbia plant, garlic and siling labuyo.

2. Find out the reaction of insects when sprayed with all-natural insecticide.


The purpose of this study is to help people to extinguish pests and insects that could destroy our properties and daily routines. This problem could alter a huge population of persons that are tired of killing insects and pests. And it could help farmers or even gardeners to make their own out product of our nature, instead of buying commercial and expensive organic insecticides. Although there are already many insect repellants, it is still good and cost-effective to use an alternative one out of natural ingredients which are available in our immediate environment.


This study focused in the effectiveness of an economical and alternative insect repellant made up of the sap of euphorbia plant, garlic and siling labuyo. This study is limited also in finding the reactions of insects when sprayed with all-natural insect repellant.




Euphorbia is a genus of plants belonging to the gamily Euphorbiaceae. It consist of about2160 Species. Euphorbia is one of the most diverse genera in the plant kingdom. The botanical name “Euphorbia” derives from “Euphorbus”, the Greek physician of King juba II of Numidia. He is reported to have used a certain plant, a herbal remedy for a swollen belly. Euphorbia Plants are annual or perennial herbs, woody shrubs with a caustic, poisonous milky sap. The roots are fine or thick and tuberous. Many species are more or less succulent and thorny. The deciduous leaves are opposite, alternate or in whorls. In succulent species, the leaves are mostly small and short lived.


Garlic is specie in the onion family, Alliaceae. Garlic has been used throughout history for both culinary and medicinal purposes. The garlic plant’s bulb is...
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