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  3. Ambrosia artemisiifolia

Ambrosia artemisiifolia

Basic information
Scientific name Ambrosia artemisiifolia

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ブタクサ
Common names Bitterweed, Common Ragweed, hogweed, Annual ragweed
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range North America.
Habitat Farm area, fruit garden, pasture field, lawn field, roadside, vacancy, edge of forest, river side, etc.
Invasion information
Range in Japan Almost entire Japan including Okinawa. Range in Japan
Origin Unknown.
Date The first introduction was ca. 1877. Establishment was ca. 1925 or later. A specimen record was in 1972.
Route Accidental: Details unknown.
Impact Actually: Competition with native species, crops, lawn grasses. Allelopathy. Parasite (insects, fungi, viruses, parasitic grass genus Cuscuta). Allergen for hay fever.
Affected organism: Native grasses, crops, lawn grasses, etc (competition). Human (health damage).
Regulation in Japan
Introduced range in other countries South America, Europe, Asia, and Australia.
Reference Notes
  • Hotta et al. (1989) Useful Plants of the World. Heibonsha, Tokyo (in Jpn)
  • Jpn Assoc Advanc Phyto-Regul & Inst Contr Agrochem, Minist Agr, China (2000) Chinese Colored Weed Illustrated Book. Zenkoku-Noson-Kyoiku-Kyokai, Tokyo
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Osaka (in Jpn)
  • Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn)
  • etc.
South Korea prohibits importation of this species.