Invasion information |
Range in Japan |
Lowland in almost entire Japan |
|
Origin |
Unknown. |
Date |
Introduced around 1870. |
Route |
Deliberate: As a pasture plant. |
Impact |
Hybridization with native plants. Competition with native, crop, and pasture plants. Host for insects and fungi. Allergen for hay fever. Native organism(s) affected: Native close montane populations (hybridization). Native and crop plants (competition). |
Regulation in Japan |
No action for prevention, mitigation, control, or eradication. |
Introduced range in other countries |
Africa, Oceania, North and Latin America. |