I was trying to paint my house when I discovered I had yellow jackets living in my wall. I tried to spray them with a bee killer several times and had zero success and I didn't know what I was going to do with them. One day I was talking to a friend about my problem and he told me to blow some seven dust in there so I did it. I blow 3 lines of seven dust in the hole 1 may have been good enough but I didn't like how they just kept coming in and out like nothing so the 3rd and final line went in after dark as I was hoping to get them all one last time when they were all in the hive. Come morning the yellow jackets were gone I'm not sure if they died or just moved out either way they are no longer there and no longer my concern. If you give this a try stay safe don't breath in the dust don't get stung and if your on a ladder or step stool don't fall off. god speed and good luck