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== Relationship to humans ==
[[دوتنه:Aedes aegypti biting human.jpg|thumb|right|''[[Aedes aegypti]]'', a parasite, and vector of [[dengue fever]] and [[yellow fever]]]]
Many insects are considered pests by humans. Insects commonly regarded as pests include those that are parasitic ([[mosquito]]es, [[lice]], [[bed bug]]s), transmit diseases ([[mosquito]]es, [[fly|flies]]), damage structures ([[termite]]s), or destroy agricultural goods ([[locust]]s, [[weevil]]s). Many [[entomologist]]s are involved in various forms of [[pest (animal)|pest]] control, often using [[insecticides]], but more and more relying on methods of [[Biological pest control|biocontrol]].<ref>{{cite web | title=Beneficial Insects, Mites and Organisms | url=http://www.biconet.com/biocontrol.html | publisher=Biocontrol Network | accessdate=2009-05-06}}</ref><ref>{{cite book|author=Davidson, E. |year=2006|title= ''Big Fleas Have Little Fleas: How Discoveries of Invertebrate Diseases Are Advancing Modern Science'' |pages= |ISBN= 0-8165-2544-7
Although pest insects attract the most attention, many insects are beneficial to the [[environment (biophysical)|environment]] and to [[human]]s. Some [[pollination|pollinate]] [[flowering plant]]s (for example [[wasp]]s, [[bee]]s, [[butterfly|butterflies]], and [[ant]]s). Pollination is a trade between plants that need to reproduce, and pollinators that receive rewards of [[nectar (plant)|nectar]] and [[pollen]]. A serious environmental problem today is the [[pollinator decline|decline of populations of pollinator]] insects, and a number of species of insects are now cultured primarily for [[pollination management]] in order to have sufficient pollinators in the field, [[orchard]] or [[greenhouse]] at [[bloom]] time.
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