Insects are considered pests for a variety of reasons, including direct damage by feeding on crop plants in the field or by infesting stored products, indirect damage by spreading viral diseases of crop plants, spreading several diseases among humans and livestock, and annoyance to humans. Examples of insects regarded as pests include the phylloxera, migratory locusts, the Colorado potato beetle, the boll weevil, Japanese beetle, aphids, mosquitoes, cockroaches, the Western corn rootworm, and some fly species.
In the past entomologists working on pest insects attempted to eradicate species. This rarely worked except in islands or controlled environments and raised ethical issues. Over time the language changed to terms like control and management.
Without insects to clean up decomposing material, the world would be a pretty filthy place, but there is a variety of types of damage pests can cause that make you want them as far away from your home as possible. Here’s a look at a few different insects and the types of pest damage they cause.