My son was working outside, riding on a tractor yesterday. He came in and said the buffalo gnats were driving him crazy. They covered him and the tractor and were biting him.
I put 30 drops of cedar essential oil into 2 ounces of rubbing alcohol that I had in a spray bottle. He sprayed himself and the tractor! He later reported that the gnats left him and the tractor alone the rest of the afternoon.
A bonus is that cedar smells great!
~Mama to Many~