Citronella oil can be obtained by crushing leaves of a citronella grass. The oil works as a mosquito repellent and can be applied to the skin. However, some people are allergic to citronella oils so it is not recommended for everyone to use this oil on the skin.
Do citronella candles keep mosquitoes away?
Don't use citronella candles. Citronella candles are great for setting a mood, but they're not so great for the very thing they're advertised to do: repel mosquitoes. At a distance of 1 meter, DEET and oil of lemon eucalyptus sprays reduced mosquito attraction by 60%. The only wearable device that worked was an OFF!
Do Citronella plants work against mosquitoes?
However, there isn't any objective evidence that just having Citrosa plants around will repel mosquitoes, even though they give off a citronella odor. That doesn't mean Citrosa plants are worthless. Rubbing the crushed leaves on your skin may repel mosquitoes like any citronella-based repellent for the skin.