Invasion information |
Range in Japan |
Honshu (except northern part), Shikoku, and Kyushu Islands. |
|
Origin |
Unknown. |
Date |
The first record in Japan was in 1980 at Nasu, Tochigi Pref. |
Route |
Accidental: Hitchhiking on imported hay. Spreading from farm to farm by hitchhiking on tractors. |
Impact |
Competition. Allelopathy. Host for insects, fungi, and nematodes. Native organism(s) affected: Native and crop plants, including corn and rice |
Regulation in Japan |
No action for prevention, mitigation, control, or eradication. |
Introduced range in other countries |
Temperate to tropical region in Europe, Africa, Asia, Oceania, North and Latin America. |