Wasps are considered pests for the painful stings they can inflict. There are over types of wasps in the United States. Wasp control is warranted in circumstances when a wasps nest is established in a area in close proximity to people and pets.
Due to farmers expanding into the grasslands and only growing one crop pests tend to begin to populate the farms and cause the farmers to use pesticides. Animals might eat these plants and the pesticides killing them and lowering their population.