I'm usually all for letting nature just be in my backyard. I'd rather take preventative measures (like the fence around my garden to deter hungry bunnies) that allow us all to live harmoniously together than poison, trap, or kill. Sometimes, though, insects get a little too
intrusive and that can be a problem, especially when they're insects that sting.
If you have a wasp problem in your backyard, the best way to get rid of them is to remove the nest.
We have to do that at least twice a year in our children's "fort," and we try to keep an eye on it so we can stop the nest building before it gets out of hand. But if you can't find the nest or are afraid to move it, a simple, homemade wasp trap
may help you catch the queen (especially if you use it in the spring) or reduce the number of wasps in the area nearest your home.
Keep in mind that wasp traps' effectiveness are not proven, and if you aren't careful, you could end up drawing more
wasps to your home. In addition, wasps really are beneficial insects
who eat the bugs that bug you the most. So if you can live in harmony, do. If you can't, these simple measures are worth a try.