July 10, 2012
Fly Repellant That Really Works
This actually will repel flies. The science behind it has to do with the way a house fly's eyes work.
Insects have compound eyes. Instead of one lens they see through two spheres with many lenses. But apart from that they also often have extra single lens eye on the front of the head. Each lens of the compound eye catches it's own image. The final image an insect sees is like a mosaic. The more lenses the compound eye bears the higher the resolution of the image. The two large spherical eyes of a fly give an almost complete 360 degree vision. copied from http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artfly/eye.html
Because of the multiple eyes, the fly sees the pennies in this little trick as a BIG predator and will not venture near.
The instructions said fill a zip lock baggie part full of water, add 4-6 pennies and zip. Hang around the space you want to be fly free. I put new pennies in mine (shiny) and hung them on my deck rail. We were eating watermelon on the deck after I hung them up. I actually watched a fly sitting on a plant hanger and it did not come onto the deck! I have hung them from the ceiling on the porch now and still no flies.