<blockquote>Generations of Eastern European housewives doing battle against bedbugs spread bean leaves around the floor of an infested room at night. In the morning, the leaves would be covered with bedbugs that had somehow been trapped there. The leaves, and the pests, were collected and burned — by the pound, in extreme infestations.</blockquote>
via <a href="http://www.nytimes.com/2013/04/10/science/earth/how-a-leafy-folk-remedy-stopped-bedbugs-in-their-tracks.html?_r=1&amp;">How a Leafy Folk Remedy Stopped Bedbugs in Their Tracks - NYTimes.com</a>.