Homestyle: Do bags of water and pennies repel flies? Stylish grab bars; ‘Backyard Foraging’

Homestyle: Do bags of water and pennies repel flies? Stylish grab bars; ‘Backyard Foraging’, News & Observer, July 11, 2013. Question: Is there any validity to putting a Ziploc bag half-filled with water and a few pennies near a window to keep flies away? Mike Stringham, an entomologist who’s now retired from NC State University, once tested the method in an egg-packing plant and found the bags actually attracted houseflies. However, his tests were conducted indoors under artificial lighting.