We want to get a jump on these pesky things this summer. We don't have much airflow in our backyard, so they generally stick around. Our pest treatment company has said they would treat us for the summer for $800 (less than a 1/4 acre), but I think that is robbery. Has anyone tried any of the propane or CO2 contraptions? What kind did you use and did it work for you? Does anything else work? We keep puddles away, cut the grass, etc. but these guys come at us like dive-bombers! Has anyone had a treatment contract? Does it work? Is $800 ridiculous? We would pay almost anything to be able to enjoy our backyard without giving the equivalent of a Red Cross donation every evening!