I had great luck last year...a few popped up and my traps worked great. Rid myself of them pretty quick and my yard was clear until about a month ago then all the sudden they invaded again and I cant seem to get a single one of them. The last two batches seem to have popped up overnight so I may have to camp out tonight and see if I can catch 'em in the act. I have 4 traps set in the front yard right now but based on my experience last year, if you dont get it within about an hour of setting the trap...you're not going to get it. Bastards!