Tohoku University team discovers blue light is effective at killing insects

Earlier this year Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura won the Nobel Prize in Physics for their development of an efficient blue light-emitting diode (blue LED).

It was a well-deserved victory for the Japanese scientists whose invention continues to impact our lives in ways we often don’t even notice. It could be in the display you’re looking at right now or it could be helping some of the millions of people in parts of the world without electrical infrastructure get affordable lights for their homes.

And now in a report published in Scientific Reports, a team of researchers from Tohoku University have found a new use for blue LED. When used in the right frequency it can be an effective, safe, clean, and cheap way to kill insects. For the first time, they showed that visible light around the blue part of the spectrum is lethal to insects such as mosquitoes and fruit flies.

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