Pure citronella oil has powerful mosquito-repellant properties. This is the most important benefit of it. There are a couple ways to keep mosquitos and bugs away with this oil; You can apply it to your skin by diluting a few drops in a carrier oil and distributing it liberally on any exposed areas. The best oil for human use is organic or therapeutic grade.
If you are using other products, like a diffuser or citronella candle, be sure that they contain pure citronella essential oil. Some products are merely citronella- scented, and therefore not effective against mosquitos. The 100% pure oil is a crucial ingredient.