Herbs to repel mosquitoes Dengue Fever Villain
Mosquitoes are important vectors of disease, including Aedes mosquitoes which are the vectors for dengue fever. Anopheles mosquitoes are vectors of malaria. Nuisance mosquitoes carry encephalitis. The Aedes mosquito and many other mosquito species are carriers of lymphatic filariasis. That is still a problem in tropical countries. Including Thailand which has weather conditions suitable for spreading the species.
Therefore, both the source and the destruction of mosquitoes must be controlled to prevent the spread of disease. Preventing mosquito bites is another popular method. Therefore, chemicals that have the effect of repelling mosquitoes are used. Most of these are synthetic substances and are harmful to humans and other living things. including destroying the environment.
At the same time, these countries are the source of many medicinal plants
That have properties to prevent and eliminate insects. Nowadays, there is more study and use of natural substances to prevent mosquito bites, including herbal extracts with scents from essential oils (essential or volatile oils). Natural mosquito repellent substances have many advantages over synthetic chemicals that do not. Accumulation is harmful to health. Especially when used for a long time and does not destroy the environment and affect the ecology of plants and animals Natural substances are therefore safe for users. In addition, they are often specific to the type of mosquito.
Plants in the genus Cymbopogon.
Essential oils from plants in the genus Cymbopogon include various types of lemongrass. Effective against many types of mosquitoes such as Anopheles mosquitoes, Aedes mosquitoes and nuisance mosquitoes.
Citronella (Cymbopogon nardus (L.) Rendle)
The mosquito repellent effect of citronella oil containing the important ingredients citronella, geraniol and citronellol has been studied in the form of a cream. It was found that the formula containing 17% citronella oil protected against ยูฟ่าเบท https://ufabet999.app Aedes mosquitoes for approximately 3 hours. The cream containing 14% citronella oil reduced the number of annoying mosquitoes that came to roost within 1 hour after applying the cream. In addition, ethanol extract of citronella mixed with olive oil can repel Aedes and nuisance mosquitoes for 2 hours. Creams containing essential oil from citronella leaves at concentrations of 25, 2.5 and 5.0% protect against Anopheles mosquitoes for approximately 2 hours. While the concentration of 10% gives results for more than 4 hours.
Lemongrass (Cymbopogon citratus (DC.) Stapf)
Lemongrass oil in liquid paraffin, 20 and 25% concentration, has a 100% protective effect against Aedes mosquitoes in the first 1 hour and decreases to approximately 95% within 3 hours. Product preparation 15% lemongrass oil in the form of cream and ointment has been found to be effective in protecting against mosquito bites. The properties of the product components affect the release of essential oils. and affects the efficiency of protecting against mosquitoes as well Lemongrass essential oil containing 2 mg/cm2 of geraniol was able to reduce mosquito bite rates by 10, 15, and 18% at 1, 2, and 3 hours, respectively. Compared to not applying essential oil from lemongrass. A bath soap containing 0.1% citronella oil, 0.5% lemongrass oil, and 1% neem oil can repel mosquitoes over a period of 8 hours.