[n = 33]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| 1900-1924 | Unknown | Sweden | not established | unknown |
| unknown | Unknown | Austria | established | |
| unknown | USA | British Columbia | established | unknown |
| unknown | Unknown | Iran | probably established | unknown |
| unknown | Unknown | Ireland | established | some |
| unknown | Unknown | Norway | probably established | |
| unknown | Unknown | Yugoslavia | established | |
| unknown | Unknown | Russia | unknown | |
| unknown | USA? | Viet Nam | unknown | |
| unknown | Unknown | Spain | established | |
| unknown | Unknown | Switzerland | probably established | |
| unknown | Unknown | Tigris-Euphrates basin, Turkey | unknown | |
| unknown | Unknown | Ukraine | unknown | |
| unknown | Italy | United Kingdom | established | unknown |
| 1930 - 1950 | Unknown | France | established | |
| 1800 - 1899 | Unknown | Slovakia | established | |
| 1871 | North America | Flanders | established | |
| 1877 | USA (California) | New Zealand | established | probably none |
| 1885 | Germany | Poland | established | some |
| 1885 | North America | Germany | established | |
| 1890 | Unknown | Czech Republic | established | some |
| 1893 | California, USA | Hawaii | not established | |
| 1900 | Unknown | Denmark | established | unknown |
| 1900 | Belgium | Netherlands | established | unknown |
| 1902 | Germany | Hungary | established | some |
| 1906 | North America | Italy | established | some |
| 1908 | USA | Chile | probably established | some |
| 1910 | Eastern Europe | Romania | established | probably none |
| 1915 | USA | Puerto Rico | established | |
| 1922 | Germany | Finland | established | unknown |
| 1935 | Germany | Belarus | established | unknown |
| 1975 | Unknown | Bulgaria | established | |
| 1984 | USA | China | probably established | unknown |