CO2 seems to be extremely effective in general, but what I really want is for someone to create a commercial version of something I saw DIY'd on Reddit. They used safely-contained smoldering coals placed behind a high-speed outdoor fan, with mosquito netting secured loosely (but with no gaps) to the front of the fan.
The fan intakes CO2 from the coals... and blows it out into the neighborhood (I think he claimed it was detectable at 60 or 80 feet?) to essentially advertise. When mosquitos approach, they're sucked into the fan intake, and can't get out past the blades and netting. Most are dead by morning, and the rest you spray down before removal. IIRC he said he only needed to do it one night every few weeks to keep the population unnoticeable, and he'd wake up to thousands in the netting the next morning.
I'm sketched-out by the CO2 mechanism, so I've never tried it, but figuring out an extremely slow release mechanism from a small tank seems doable. Maybe one day I'll get around to tinkering with it. My neighborhood started spraying, so it hasn't been bad enough to put much effort into.
The fan intakes CO2 from the coals... and blows it out into the neighborhood (I think he claimed it was detectable at 60 or 80 feet?) to essentially advertise. When mosquitos approach, they're sucked into the fan intake, and can't get out past the blades and netting. Most are dead by morning, and the rest you spray down before removal. IIRC he said he only needed to do it one night every few weeks to keep the population unnoticeable, and he'd wake up to thousands in the netting the next morning.
I'm sketched-out by the CO2 mechanism, so I've never tried it, but figuring out an extremely slow release mechanism from a small tank seems doable. Maybe one day I'll get around to tinkering with it. My neighborhood started spraying, so it hasn't been bad enough to put much effort into.