Editing Japanese beetle (section)

== Distribution ==
''Popillia japonica'' is native to Japan, but is an invasive species in North America and Europe.

The first written evidence of the insect appearing within the United States was in 1916 in a [[Nursery (horticulture)|nursery]] near [[Riverton, New Jersey]].<ref>{{cite news |newspaper=[[Reading Eagle]] |url=https://news.google.com/newspapers?nid=1955&dat=19230722&id=2ZYhAAAAIBAJ&pg=2824,4141070 |title=Japanese Beetle Ravages |date=22 July 1923 |page=26 |access-date=28 September 2015 |archive-date=6 July 2020 |archive-url=https://web.archive.org/web/20200706184105/https://news.google.com/newspapers?nid=1955&dat=19230722&id=2ZYhAAAAIBAJ&pg=2824,4141070 |url-status=live}}</ref> The beetle larvae are thought to have entered the United States in a shipment of [[Iris (plant)|iris]] bulbs prior to 1912, when inspections of commodities entering the country began. As of 2015, just nine western states of the United States were considered free of Japanese beetles.<ref name="Guide"/> These beetles have been detected in airports on the west coast of the United States since the 1940s. Only three were found in [[Washington (state)|Washington State]] in 2020, but from late June to September 3, 2021, there were over 20,000 found in [[Grandview, Washington|Grandview]] alone.<ref name="WSDA-20k-in-2021">{{cite web |date=3 September 2021 |title=Japanese beetle count passes 20,000 |url=http://wastatedeptag.blogspot.com/2021/09/japanese-beetle-count-passes-20000.html |url-status=live |archive-url=https://web.archive.org/web/20210916230508/https://wastatedeptag.blogspot.com/2021/09/japanese-beetle-count-passes-20000.html |archive-date=2021-09-16 |access-date=2021-09-16 |website=[[Washington State Department of Agriculture|WSDA]] AgBriefs}}</ref>

The first Japanese beetle found in Canada was inadvertently brought by tourists to [[Yarmouth, Nova Scotia]], by ferry from [[Maine]] in 1939. During the same year, three additional adults were captured at Yarmouth and three at [[Lacolle, Quebec|Lacolle]] in southern [[Quebec]].<ref name=CFIA>{{cite web |url=http://www.inspection.gc.ca/english/plaveg/pestrava/popjap/tech/popjape.shtml |title=''Popillia Japonica'' (Japanese Beetle) – Fact Sheet |publisher=Canadian Food Inspection Agency |access-date=28 September 2015 |date=19 February 2014 |url-status=dead |archive-url=https://web.archive.org/web/20101204140237/http://www.inspection.gc.ca/english/plaveg/pestrava/popjap/tech/popjape.shtml |archive-date=4 December 2010}}</ref>

Japanese beetles have been found on the islands of the [[Azores]] since the 1970s.<ref>{{cite journal |url=http://www.sea-entomologia.org/Publicaciones/PDF/BOLN43/451_452BSEA43PHOJapaneseBetleAzores.pdf |title=The Japanese beetle ''Popillia japonica'' Newman, 1838 (Coleoptera: Scarabaeidae) in the Azores islands |author=Virgílio Vieira |s2cid=83531725 |year=2008 |journal=Boletín Sociedad Entomológica Aragonesa |volume=43 |page=450 |access-date=28 September 2015 |archive-date=29 September 2015 |archive-url=https://web.archive.org/web/20150929111743/http://www.sea-entomologia.org/Publicaciones/PDF/BOLN43/451_452BSEA43PHOJapaneseBetleAzores.pdf |url-status=live}}</ref> In 2014, the first population in mainland Europe was discovered near [[Milan]], Italy.<ref>{{cite web |url=https://gd.eppo.int/reporting/article-3272 |title=First report of ''Popillia japonica'' in Italy |publisher=[[European and Mediterranean Plant Protection Organization|EPPO]] |access-date=28 September 2015 |archive-date=29 September 2015 |archive-url=https://web.archive.org/web/20150929073528/https://gd.eppo.int/reporting/article-3272 |url-status=live}}</ref><ref>{{cite web |url=http://www.parcoticinolagomaggiore.it/docs/archivio/scheda_popillia_japonica.pdf |title=''Popillia japonica'' Newman, 1841 |publisher=Assessorato Agricoltura, Caccia e Pesca, Regione Piemonte |language=it |access-date=28 September 2015 |archive-date=4 March 2016 |archive-url=https://web.archive.org/web/20160304202310/http://www.parcoticinolagomaggiore.it/docs/archivio/scheda_popillia_japonica.pdf |url-status=dead}}</ref> In 2017, the pest was detected in nearby [[Ticino]], Switzerland.<ref>{{cite web |url=https://gd.eppo.int/reporting/article-6128 |title=First report of Popillia japonica in Switzerland |access-date=19 June 2018 |date=2017 |publisher=EPPO |archive-date=20 June 2018 |archive-url=https://web.archive.org/web/20180620024226/https://gd.eppo.int/reporting/article-6128 |url-status=live}}</ref> In 2023, the first population north of the [[Alps]] was detected in [[Kloten]] near Zürich, Switzerland.<ref>{{Cite web |date=2023-07-25 |title=Invasive Art - Japankäfer in Kloten entdeckt: Kanton will Schädling tilgen |url=https://www.srf.ch/news/schweiz/invasive-art-japankaefer-in-kloten-entdeckt-kanton-will-schaedling-tilgen |access-date=2023-07-25 |website=Schweizer Radio und Fernsehen (SRF) |language=de}}</ref>