Does a bag with water in it keep away flies?

A scheme to save money on water pitchers?” While any effect on temperature is purely accidental, these hanging bags are all about driving pests away. People hang these bags outside their homes, businesses and even in their barns to drive flies away. Various takes on the water-bag practice exist.Click to see full answer. Consequently, why does a bag of water keep flies away?The fly bases his movement by light and the refracted light coming through the water in the plastic bag confuses the fly causing him to move on to a place that is easier on the eyes. And when you have a few thousand to deal with at one time, the easier, the better. do coins in a bag of water keep flies away? To make your own fly repellent, simply get a gallon-sized zip-loc bag, fill it half to 3/4 with clean water, and drop 3 or 4 pennies in the bottom of the bag. Once the bag is firmly sealed, it can be hung from or nailed to an eave near a doorway to keep the nasty critters from entering your home. Keeping this in view, does a bag of water keep flies away Mythbusters? Bags of water hung from the ceiling can repel flies. This myth is based in the theory that refracted light in water confused flies’ compound eyes. The first chamber would hold the flies, the second would hold some rotten meat, and the third would hold both rotten meat and a bag of water.Do water bottles keep flies away?So the water in bags and bottles acts as an amplifier of reflections, movements and colors to the flies’ eyes, which scare them away. Even if not widespread in the north, apparently the practice has been implemented in some areas, as highlighted by LifeHacker some time ago.