Amazing for Camping--just hang it from a tree. DIY: ORGANIC FLY TRAP Supplies: A two-liter soda bottle (used) Sharp knife A wire hanger Match, lighter, or stove gas flame Electric tape Bait (like a small piece of meat or dog poo mixed with water!
Homemade fly trap that actually works 1 quart jar, with lid cup vinegar cup sugar Water Puncture some medium holes in the lid. Add the sugar & vinegar, then top with water. Screw on lid & place jar where the flies are a nuisance.
Around our place there is no such thing as a 'Fly Free Season' . Build the Cadillac of Fly Traps for a Fly-Free Summer says if getting this many flies- a good clean up of old bedding etc may be needed as well