Carry oranges with you on a hike or when camping. You can drink the juice, rub the peel on your skin for an insect repellant, and when the peels dry, they will burn and keep bugs away from your camp with the lovely orange smell.
But that’s not all. You can run a whole orange through a blender, strain it, and spray it where ants come in. They don’t like the smell, and the oils from the peels kill them instantly. It isn’t toxic to pets or children.