Yellow flag
| Botanical Name | Iris psendacorus |
|---|---|
| Family | Iridaceae |
| Origin | Europe, West Asia and Canada |
Identification
Yellow flag is an evergreen semi-aquatic Iris. It produces conspicuous yellow fowers during August.Habitats
Favours the margins of lakes, ponds, rivers and drains.Impact to Biota and Ecosystems
Infestations can trap silt, encouraging flooding. Yellow flag also has the potential to adversely affect estuarine and salt marsh vegetation. Dense stands hamper fishing and hinders access to water bodies. Yellow flag is toxic to livestock which generally avoid grazing the plant.Dispersal Routes, Vectors, Infestation Sources
Yellow flag is spead by seed or fragmentation of the root rhizomes.Management
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Management |
|
| Physical Control |
Small infestations can be removed by hand taking care to remove all the rhizome. |
| Disposal | |
| Chemical Control |
300 ml Glyphosate/10 L water plus 20 ml Oganosilicone penetrant. Follow up control will be required. |
|
Biological Control |
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| Recommended Approach | |
Further Comment
This plant is prohibited from propagation, sale and distribution within New Zealand!