Exceedingly effective. Ideal for smallholdings, poultry farms, dairies - or anywhere plagued by flies every summer. Low cost, easy to use and disposable. Catches up to 20,000 flies every trap and once trapped they can´t escape. Bait is especially appealing to female flies - so reducing the next generation. Simply hang the fly trap away from the area you wish to protect. Bait lasts 4-6 weeks.