Invasion information | ||
Range in Japan | Most of entire Japan | |
Origin | Unknown. | |
Date | The first import was in 1910. The first record of naturalization was in 1960, at Gumma Pref. | |
Route | Accidental: Hitchhiking on imported wheat.; Deliberate: Sometimes cultured for food; | |
Impact | Competition with native plants and crops. Allelopathy. Parasites (insects, viruses). Native organism(s) affected: Native plants, crops, etc. | |
Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
Introduced range in other countries | N Africa, Oceania, North America, Aisa. |
Reference | Notes |
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100 of the Japan’s Worst Invasive Alien Species |