Editing Cypermethrin (section)

==Environmental effects==
Cypermethrin is a broad-spectrum insecticide, which means it kills beneficial insects as well as the targeted insects.<ref>{{cite journal|year=1992|title=Effects of forest spraying with two application rates of cypermethrin on food supply and on breeding success of the blue tit (Parus caeruleus)| journal=Environmental Toxicology and Chemistry | volume = 11 | issue = 9 | pages = 1271–1280|author1=Pascual, J.A.  |author2=S.J. Peris | doi = 10.1002/etc.5620110907|bibcode=1992EnvTC..11.1271P }}</ref> Fish are particularly susceptible to cypermethrin,<ref>{{cite journal|year=1982|title=Aquatic toxicology of cypermethrin. I. Acute toxicity to some freshwater fish and invertebrates in laboratory tests| journal=Aquatic Toxicology | volume = 2 | issue = 3 | pages = 175–185 | author=Stephenson, R.R.|doi=10.1016/0166-445X(82)90014-5|bibcode=1982AqTox...2..175S }}</ref><ref>{{Cite journal|last1=Ranjani|first1=T. Sri|last2=Pitchika|first2=Gopi Krishna|last3=Yedukondalu|first3=K.|last4=Gunavathi|first4=Y.|last5=Daveedu|first5=T.|last6=Sainath|first6=S. B.|last7=Philip|first7=G. H.|last8=Pradeepkiran|first8=Jangampalli Adi|date=2020-02-07|title=Phenotypic and transcriptomic changes in zebrafish (Danio rerio) embryos/larvae following cypermethrin exposure|journal=Chemosphere|volume=249|pages=126148|doi=10.1016/j.chemosphere.2020.126148|issn=1879-1298|pmid=32062212|bibcode=2020Chmsp.24926148R|s2cid=211134591}}</ref> but when used as directed, application around residential sites poses little risk to aquatic life.<ref name=npic>{{cite web | url = http://npic.orst.edu/factsheets/cypermethrin.pdf | title = Cypermethrin | publisher = National Pesticide Information Center}}</ref> Resistance to cypermethrin has developed quickly in insects exposed frequently and can render it ineffective.<ref>{{cite journal|year=1991|title=Responses of populations of the tobacco budworm (Lepidopterea: Noctuidae) from northwest Mexico to pyrethroids | journal=Journal of Economic Entomology | volume = 84 | issue = 2 | pages = 363–366 | author=Martinez-Cabrillo, J.L.|display-authors=etal|doi=10.1093/jee/84.2.363 }}</ref>