Here in Northeast Colorado, we get it once or twice a week, not by planes, but by the spray truck, all in the guise of mosquito kills. We have watched the bug truck sit and spray a gas station's flying multitude (under the lights) for 4 to 5 minutes once, then move on. We should have taped the event, as we noticed no decrease in the flying swarm even one hour after the spray. Lots of asthma around here, inhalers in almost every family. We just sit and watch the carnage of humanity around here.