If you've ever been to the west coast of Scotland in early summer you'll have soon discovered that midges are an absolute pest! ( particularly if you're camping, as I was.... ).
I heard of a clever idea for a trap. It combined an ultraviolet lamp with a small propane flame, which of course produced CO2.. an attractant ( I wondered how the b*****s found me!)
There was then a small fan which sucked external air though a porous bag - like a vacuum cleaner - which was impregnated with insecticide.
Apparently this gadget could clear an acre, and in the morning you could empty out several 100g
of dead midges...
I want one!
Add your ultrasound widget and I reckon it could be even better........
regards
Allan