[n = 56]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| 1900-1924 | USA | Russian Federation (Former USSR) | established | unknown |
| 1900-1924 | Unknown | Alaska | probably established | probably some |
| 1925-1949 | Germany | Hungary | probably established | some |
| 19th century | Belgium | Netherlands | not established | |
| 19th century | Austria | Romania | established | probably some |
| unknown | Canada | Chile | established | some |
| unknown | United States of America | China | unknown | no data |
| unknown | Unknown | UK | unknown | |
| unknown | Unknown | Greece | not established | |
| unknown | Unknown | Iran | probably established | probably some |
| unknown | USA | Mexico | not established | |
| unknown | Unknown | Lithuania | unknown | |
| unknown | Unknown | Latvia | unknown | |
| unknown | Unknown | Ecuador | unknown | |
| unknown | unknown | Lebanon | probably not established | unknown |
| 1900 - 1997 | Unknown | Portugal | not established | unknown |
| 1941 - 1945 | Chile | Falkland Islands | established | |
| 1990 - 1999 | Unknown | Turkey | established | |
| 1877 - 1887 | USA | New Zealand | established | probably none |
| 1890 - 1899 | USA | Belgium | probably established | probably none |
| 1868 | USA | UK | established | unknown |
| 1870 | Denmark | Norway | established | |
| 1872 | Denmark | Sweden | established | some |
| 1872 | Germany | Sweden | established | some |
| 1876 | California, USA | Hawaii | not established | |
| 1880 | Unknown | Czech Republic | established | |
| 1883 | Unknown | Australia | established | |
| 1883 | Germany | Switzerland | established | probably some |
| 1890 | Unknown | Slovakia | established | |
| 1890 | Germany | Poland | established | some |
| 1890 | USA | Germany | established | |
| 1891 | USA | Italy | established | unknown |
| 1892 | Austria | Yugoslavia | established | |
| 1895 | USA | Finland | probably established | unknown |
| 1895 | Germany | Finland | probably established | unknown |
| 1895 | Germany | Denmark | established | |
| 1896 | Germany | Estonia | not established | none |
| 1901 | USA | Japan | established | unknown |
| 1904 | USA | Grenoble | established | unknown |
| 1904 | USA | Argentina | established | |
| 1908 | Quebec | British Columbia | established | |
| 1930 | Czechoslovakia | Bulgaria | established | |
| 1934 | France | Spain | probably established | |
| 1937 | USA | Venezuela | established | |
| 1941 | France | Morocco | not established | |
| 1948 | Chile | Bolivia | established | |
| 1949 | UK | Kenya | probably not established | unknown |
| 1950 | USA | South Africa | not established | |
| 1955 | Unknown | Colombia | not established | |
| 1955 | South Africa | Zimbabwe | established | |
| 1955 | USA | Peru | established | |
| 1960 | Canada | India | probably not established | probably none |
| 1962 | France | Kerguelen Is. | established | probably some |
| 1970 | Germany | Austria | established | |
| 1971 | Italy | Cyprus | not established | |
| 1974 | Australia | Papua New Guinea | established |