MOSQUITO REPELLENT ACTIVITY OF THE LEAF EXTRACTS OF Cymbopogon citratus AND Eucalyptus globulus.....

Plant-based repellents have been used as a personal protective strategy against many Anopheles species for generations in traditional practise. Traditional repellent plant knowledge is a valuable resource for developing new natural repellents as an alternative to chemical repellents. Many studies have found evidence of plant extracts' repellent properties against malaria vectors all throughout the world. The goal of this study was to see how effective mosquito repellent leaf extracts from Cymbopogon citratus and Eucalyptus globulus were against anopheles species. The larvae of mosquitos were raised to adulthood. The leaves were picked, cleaned, and dried for 5-7 days in the shade at room temperature before being powdered with a mortar and pestle. Dreyer and Kragl's (2008) approach was used to extract the leaves, and the five extracts obtained were evaluated utilising human-bait methodologies. The results show that different extracts of Cymbopogon citratus have varying degrees of repellency, with the chloroform fraction having the highest degree of repellency of 73.7 percent (at 12.5 percent concentration) and 89.5 percent (at 25 percent concentration), and the petroleum ether fraction having the lowest degree of repellency of 15.4 percent (at 12.5 percent concentration) and 30.8 percent (at 25 percent concentration), while other extracts have also shown some degree of repellency. Different extracts of Eucalyptus globulus show varying degrees of repellency, with the ethanol fraction showing the highest degree of repellency of 71.1 percent (at 12.5 percent concentration) and 92.9 percent (at 25 percent concentration), and the ethyl acetate fraction showing the lowest degree of repellency of 21.4 percent (at 12.5 percent concentration) and 35.7 percent (at 25 percent concentration), while other extracts have also shown some degree of repellency ranging from Plant oils, which are reasonably safe, affordable, and widely available in many regions of the world, may one day serve as viable alternatives to synthetic repellents.

Please see the link :- https://www.ikprress.org/index.php/JOGAE/article/view/7343