Citronella and Lemongrass
The essential oils of citronella and lemongrass are very useful insect repellents. They can be used safely in the home, especially in the kitchen, or outdoors in a confined area, tent etc.
Simply clean a spray bottle thoroughly, add 10-12 drops of lemongrass or/and citronella to a pint of water, shake well and you have an eco-friendly insect repellent which smells pleasantly of lemons. Or use the mixture in an oil burner to keep flies away.