| Impact ID | 7981 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | A joint survey conducted by the Invasive Plant Associate of Wisconsin (IPAW) and the Great Lakes Indian Fish and Wildlife Commission (GLIFWC) found that Epilobium hirsutum is a moderate competitor and has a moderate to high impact. |
| Reference | 25424 |
| Cost | |
| Location | Wisconsin, USA |