This may be weird but, I have noticed that in the two weeks since I captured this hive (my first) I have not had near the wasp and hornet problem that I used to and normally do this time of year. I have a window A/C unit that empties into a pail and a leaky faucet in the back that they congregate around, normally. I like this! It wasn't instantaneous. They tapered off as the days went by. Like I said, weird.