Invasion information |
Range in Japan |
Almost entire Japan. In western Japan, relatively abundant in upland. |
|
Origin |
Unknown. |
Date |
At first cultivated in Koishikawa Botanical Garden, Tokyo. Naturalized date is unknown. |
Route |
Deliberate: As a pasture grass |
Impact |
Competition with native plants. Degradation of pasture. Host for insects and fungi. Allergen for hay fever. Native organism(s) affected: Native and pasture plants. |
Regulation in Japan |
No action for prevention, mitigation, control, or eradication. |
Introduced range in other countries |
Africa, Asia, Oceania, and North and Latin America. |