Invasion information |
Range in Japan |
Almost entire Japan. Relatively abundant in northern and upland area. |
|
Origin |
Unknown. |
Date |
Introduced in 1874 to Hokkaido. |
Route |
Deliberate: as a pasture grass |
Impact |
Competition with native and crop plants (especially in upland). Host for insects and fungi. Allergen for hay fever. Native organism(s) affected: Native and crop plants. |
Regulation in Japan |
No action for prevention, mitigation, control, or eradication. |
Introduced range in other countries |
Asia, Oceania, North and South America |