Lemongrass is the most famous of all mosquito repellent plants: its repellent action against insects has been scientifically proven. It can be used in particular in the form of essential oil, by diffusion or by application via the cutaneous route, provided that it is diluted in a vegetable oil. Here is a synergy to diffuse to repel mosquitoes based on citronella essential oil: 30 drops of Java Lemongrass essential oil, 10 drops of Cinnamon essential oil and 5 drops of Peppermint essential oil.