Bug-zapping laser will only kill bad insectshttps://www.engadget.com/2017/06/26/intellectual-ventures-lab-photonic-fence-first-trial/The Photonic Fence can differentiate between pests and plain old bugs, then zap them with lasers, if a Department of Agriculture trial goes well. Using cameras and other optics, the Photonic Fence scans for pests within 100 metres, looking at each bug’s “form, velocity, acceleration and wing-beat frequency.” When a target has been recognized as being from the kill list, the Fence will shoot it with the laser, and the insect will be dead within 25 milliseconds.