A few wasps near the patio. One buzzing past at a barbecue. That’s easy to brush off. But those small moments can point to a much larger issue already forming nearby.

Most ground-nesting wasps are solitary and mind their own business as they pollinate plants and prey on unwelcome garden pests, such as caterpillars. But social wasps, which live in a colony with a ...

Plus, how to prevent them in the future. Most ground-nesting wasps are solitary and mind their own business as they pollinate plants and prey on unwelcome garden pests, such as caterpillars. But ...