Cockroaches are also the hardiest insects on the planet because they have a capability to stay live for a month without food. The high price and health risks problem from food branded chemical insecticides gives dilemma to Filipino household. Respiratory diseases can also get from chemical insecticides inhaled by a person. This study seeks the possibility of using the extracts of Calamansi and Onion as an effective cockroach killer. The Calamansi and Onion extract as cockroach killer can be possible by the Botanical ang Chemical Properties that can be naturally found within the fruits. Calamansi have a chemical property called d-Limonene which have the capacity to suffocate and destroy the respiratory tract of an insect.
In making the insecticide,squeeze the Calamansi until the extract reaches the measurement. Slice the onion into smaller pieces then crush with juicer. For additional d-Limonene substance that melt the wax coating of insects, add some orange oil that is made by leaving the peels in a jar with alcohol then place in a sunny place. To finish the product, mix all the extracts into a sprayer. Add salt to make the product long-lasting. To test the effectiveness of this product, we used two set-ups; two boxes with ten cockroaches each inside. From the test that the researcher conducted, it revealed that there is a significant difference between the effects of the prepared product and the commercialized product with the calculated t-ratio of 10.62 which is higher than the tabular value of 2.262 at 5% level of probability and 3.250 at% level of probability.
ACKNOWLEDGEMENT We would like to expres the deepest gratitude to the following without their help,this project would not possible: First to our parents ,