CRC Wasp and Hornet Killer
If you want one of the most lethal wasp sprays available, check out CRC Wasp and Hornet Killer. It is made with two types of synthetic pyrethrins, tetramethrin and phenothrin, and both are bound together in a petrocarbon oil. Although accurate to only 20 feet, the killing power of this stuff may be worth the cost of admission right there. The extended trigger allows even gloved hands to use it effectively, and this may be one of the easiest spray cans to use. This is one of the more expensive wasp sprays on this list, but it is arguably the most effective as well.