Lemon grass Case Study Essay

Custom Student Mr. Teacher ENG 1001-04 26 September 2016

Lemon grass Case Study

Lemon grass (Cybopogon citrates) is a perennial herb widely used in Asian cuisine. It is commonly used for teas, soups and insecticides. In the Philippines lemon grass is called “tanglad” commonly used to savour Filipino delicacies. In a study Evaluation of Herbal Essential oil against Mosquitoes by the Department of Plant Production Technology and Faculty of Agricultural Technology in Bangkok Thailand affirmed that lemon grass indeed contains organic repellents against mosquitoes. In a laboratory experiment, volunteers were instructed to apply oil extracts from different target crops including lemon grass on one of their arms, while the other was untreated (control).

Both hands were inserted in a cage containing 250 nulliparous female mosquitoes ageing 5-7 day old. Mosquitoes were observed in terms movements and behaviours. Results showed that oil extracts from lemon grass, peppermint, eucalyptus, citronella, and cloves were effective to repel both dengue and malaria mosquitoes. However, the repellent effects of these oil extracts do not last longer compare to synthetic chemicals, thus, further study to improve its formulation and efficacy is needed.

Another study on “The Effectiveness of Lemon Grass as a Natural Mosquito Repellent” by the University of Southern California (USC), comparing the repellent efficacy of lemon grass extract to the DEET (N,N-diethyl-m-toluamide) based repellents or the leading commercial brands for insect repellents has found that lemon grass extract could be used as an alternative to chemical insect repellent. Lemon grass as farm pest repellent

According to Dr. Marilyn Patricio, professor from the Central Luzon State University, lemon grass is being used to repel pests in organic farming as part of the integrated pest management (IPM) strategy in agriculture. “Planting lemon grass as border crop is very effective to prevent the entry of insect pests in the farm. In fact, aside from lemon grass, we also plant peppermint and other aromatic herbs to detract insect pests from destroying the crop,” said Dr. Patricio. Like farm pests, Dr. Patricio believes that dengue mosquitoes are detracted with the pungent aroma of lemon grass. She also recommends planting lemon grass on backyard, especially near doors and windows to shoo dengue mosquitoes in entering the home.

On the other hand, in an interview with Mr. Ferdinand Salazar, Supervising Science Research Specialist from the Department of Medical Entomology, Research Institute of Tropical Medicine, Department of Health (RITM-DOH) said that, planting lemon grass on backyards could help repel mosquito, however it will not guarantee protection because people are moving around. “Though there is no perfect single approach to control mosquitoes, adding all these plus our eagerness to maintain cleanliness in our surroundings will surely control dengue mosquitoes. Because after all cleanliness will not only spare us from dengue but to other infectious diseases as well”.

Definition of terms

Lemongrass-Lemongrass is a plant that is commonly used in Asian cuisine but which may provide therapeutic and medical benefits
-lemongrass I used as the main ingredient of our project.
Mosquito repellent – is what we the researchers are going to make as a spray.

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  • Type of paper: Thesis/Dissertation Chapter

  • Date: 26 September 2016

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