I have been having a problem with yellow jackets lately. Apparently, this is an active time of year for them, and they have formed a nest. I tried some wasp and hornet killer, but it hasn't killed them all yet. Today, I sprayed some more of the pesticide, and I put up a yellow jacket trap. We'll see if that works. The trap I purchased is reusable, but I don't think I'm going to want to clean out a bunch of dead yellow jackets to reuse the same trap, so today, I ordered a disposable trap. Hopefully, the combination of the insecticide spray and the trap will eliminate the problem.