Wasps are pollinators in the garden, but not insects you want to encounter around your home, yard, or patio—they are more aggressive than bees, and you don't want to get stung while lounging outside.

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 ...