Invasion information | ||
Range in Japan | Entire Japanese main islands | |
Origin | Unknown. | |
Date | Middle or late 19 C. | |
Route | Unknown. | |
Impact | Unknown. | |
Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
Introduced range in other countries | Unknown. |
Reference | Notes |
|
In mid April, this species is dominant in some region (e.g., Mukogawa River bank, Hyogo Pref., western Japan). |