Investigatory Projects

The problem, however, is that these chemicals be expensive and scotch harm to the environment. This study aims to develop an environment friendly, safe, and effective yet specious mosquito repellent by utilize weeping pillow leaves and pine cones. The bodily function is not success but it shows the different scientific processes to be followed in doing an experiment. Mosquitoes argon one of the most poisonous substanceous creatures In the world, not single to humans but also to other land vertebrates as well. They cover vir holds that argon sometimes fatal when transmitted to humans.Diseases transmitted by mosquitoes are common In are tropics (Merit Encyclopedia, 1969). Mosquito-borne diseases are transmitted to the luggage compartment of the host through mosquito bites and contaminated food. The saliva of the mosquito is sometimes infected with pathogens. These pathogens are transmitted to the hosts when they are bitten by the mosquitoes. Common viral infections caused by Mosquitoes are more pronounced in the larval stages and can result from the usance of contaminated food. Mosquito- borne diseases intromit malaria, dengue or break bone fever, fallacies, discolor fever, and H- fever (Melts, et.AI,. 1971 Insecticides are recommended to combat these disease -carrying pests and trouble makers. Insecticides are widely used as chemicals In controlling pests, which are either positive or chemically synthesized. The plant kingdom is a vast arising of naturally occurring and selective insecticides portions of plants such as the flower, leaves, steam, or roots (Colliers, 1972). Insecticides include nicotine, rotenone, preterits, and sabbatical. Some have been used by humans for a dogged time. As early assess, nicotine was used as an insecticide in the regulate of a crude extract from tobacco.Nicotines alkaloid can be obtained from the leaves and stems of Nicotine Tobacco (Inupiat, 1976). Nicotine is harmful to humans though it doesnt effect the plan ts when applied . Rotenone, the most active of the sise alkaloids , is harmful to man but a very effective poison against various insects (Abbey, 1972). On the other hand , essential oils from eucalyptus and psychophysical were use as effective mosquito insecticide or repellent (Smith. 1996). A research made on the subject found that weeping willow tree (Saliva Babylonian) leaves regress essential oils similarly found in eucalyptus (Antonio, 1984).Pinups Insular, commonly cognize as Shaky pine, is found in Khakis hills and Motorman, in the hills of Burma and in substitution Luzon. It is a valuable source of resin turpentine. It grows up to 15 m (1 50 feet) and has very fine, grass-like needles (Tree of the World). It contains alkaloid, which is an ingredient in most insecticides. A. Materials Half a kilogram of weeping willow leaves were gathered from the Philippine Science proud School (SSH) campus. Two and Half kilograms of pine cones came from Baggie. B. Methods 1. Extract ion and DistillationForty grams of weeping willow leaves were extracted five times for 10 hours using the sloshes apparatus and titleholder as the solvent. and so two kilograms were extracted in five occasions for 10 hours each using the same apparatus and Covent as the extraction for the weeping willow leaves. after each extraction, the solution was gathered, and distilled for an hour to obtain the extract. The extract was then stored in a cold place. 2. Culture of Wriggler Stagnant water was quiet from the creek and from the SSH fish pond. The water was placed in basins and was left for two to three weeks.