In development for several years, the Photonic Fence is an anti-mosquito laser weapon that's apparently now being tested in a real world situation. I hope when it hits the market it still looks like a crazy contraption from a 1960s science fiction film! From the company site:
One potential use of the Photonic Fence is to create a virtual fence that detects insects as they cross its plane. When an invading insect is detected, our software is able to estimate the insect’s size and measure its wing beat frequency. Using this method, not only can the system distinguish between mosquitoes, butterflies, and bumblebees, but it can even determine whether a mosquito is male or female. This is important to know because only female mosquitos bite humans. Once the software establishes that the insect is a valid target, it tracks the mosquito in flight, runs a safety check to ensure no innocent bystanders are in view, and then activates a laser to zap the mosquito. The Photonic Fence could be set along the perimeter of clinics or other strategic areas to control mosquitoes without endangering humans or other animals.
From Wired UK:
When Intellectual Ventures co-founder and former Microsoft chief technology officer Nathan Myhrvold came up with the idea of a bug-killing fence in 2010, the intention was to use it to improve public health in Sub-Saharan Africa. Now, however, the Photonic Fence has become a commercial project with a particular target: the Asian citrus psyllid. This insect invader has reduced citrus production in Florida by at least 70 per cent over the last 15 years. The device has been installed on a US Department of Agriculture site in the state for its first real-world test. If all goes to plan, Intellectual Ventures aims to market the Photonic Fence to farmers protecting crops from a multitude of other pests.
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