| Impact ID | 7958 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Echinochloa crus-galli (barnyard grass) may pose a competitive threat to native species of Echinochloa such as E. muricata and E. walteri, which are endangered in Pennsylvania. |
| Reference | 24926 |
| Cost | |
| Location | |