Invasion information |
Range in Japan |
Almost entire Japan |
|
Origin |
Unknown. |
Date |
The first record was in 1933 at Sapporo, Hokkaido. Recorded in 1934 at Kobe, Hyogo Pref. Spread since 1940s. |
Route |
Accidental: With cattle food grain. |
Impact |
Potentially: Competition with native species, crops, pasture, etc. Parasite (insects, viruses) Native organism(s) affected: Native grasses, crops, pasture, etc. |
Regulation in Japan |
No action for prevention, mitigation, control, or eradication. |
Introduced range in other countries |
North and South America, Asia, Africa, Oceania. |