Invasion information | ||
Range in Japan | Almost entire Japan including Okinawa. | |
Origin | Unknown. | |
Date | The first record was in 1952 at Chiba Pref. and Shimizu Port of Shizuoka Pref. | |
Route | Accidental: With agriculture products such as grains or beans. | |
Impact | Actual: Competition with native plant, crop, pasture, etc. Allelopathy. Parasite (insects, fungi). Allergen for hay fever. Native organism(s) affected: Native plants such as Primula sieboldii, crops, pasture, etc. (competition). Human (health damage). | |
Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
Introduced range in other countries | Europe, Asia |
Reference | Notes |
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100 of the Japan’s Worst Invasive Alien Species. South Korea prohibits importation of this species. |