The Economist has an article about anti-mosquito laser defense systems.

Seriously.

The first device described is called a photonic mosquito fence:

• A series of posts about 100m apart
• Each post has a cheap camera and light source and is connected to a central computer
• When a camera detects movements it analyzes the source (mosquito species have distinctive wing-beat frequencies)
• If the source is a mosquito the computer “trains a laser onto the insect and blasts it into oblivion”!

That is awesome! Apparently the system is also cheap enough to compete with current malaria protection.

The other system described uses a ‘curtain’ of infra-red light to which mosquitoes are highly sensitive. Also very cool.