| Impact ID | 8944 |
| Impact Type | Disease/Parasite/Toxicity |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Narrow-leaved cattail (Typha angustifolia) is thought to be allelopathic, producing chemicals that discourage the growth of other plant species. |
| Reference | 25001 |
| Cost | |
| Location | |