Invasion information | ||
Range in Japan | Almost entire Japan | |
Origin | Unknown. | |
Date | Around 1890. | |
Route | Accidental: Unknown vector. | |
Impact | Competition. Allolopathy. Host for insects, nematodes, fungi, viruses, and parasitic plants. Allergen for hay fever. Accumulation of nitrate salt (harmful to husbandry). Native organism(s) affected: Native, crop, pasture plants, etc. | |
Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
Introduced range in other countries | South America, Europe, Asia, Africa, Oceania. |
Reference | Notes |
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Excluded by competition with other congeneric invasive weeds such as Amaranthus hybridus and A. palmeri |