The Government of Alberta's Aquatic Invasive Species Program will be applying a registered herbicide to control flowering rush within a portion of Lake Isle. Important information regarding this program is available in this article, and in the Reference Library section of this website.
Flowering Rush Quick Facts
- Flowering rush is a perennial aquatic plant native to Africa, Asia, and Europe and was likely introduced to North America as an ornamental plant.
- Flowering rush stems are erect and triangular, leaves are sword-shaped and twisted toward the tip, and there are 20-50 pink to white flowers in umbrella shaped clusters.
- It is able to reproduce both by seed and through rhizome (root) fragments, bulbils formed on the rhizomes, and bulbils formed on the inflorescence (flowers).
- Flowering rush infestations can displace native vegetation and alter water quality, reducing habitat for fish, wildlife, and native plants.
- Dense stands in irrigation ditches, canals, or stormwater management ponds can disrupt the flow of water, the availability of water, and increase sedimentation.
- Flowering rush can also impacts recreational use in lakes and flowing waters by interfering with boat propellers and limiting access to waterbodies for swimming, boating, and recreating.
- Control of flowering rush can be difficult, especially once well established. Methods for control or eradication by trained personnel include: careful hand digging and benthic barriers for isolated or small populations, mechanical cutting, and chemical treatment.
- Care must be taken with hand digging and cutting to ensure all plant fragments are removed and disposed of. Fragments can drift with water movement and result in new infestations.
- Flowering rush has already been found in lakes, rivers, creeks, irrigation canals and stormwater ponds in Alberta.
FOR MORE INFORMATION OR TO REPORT INVASIVE SPECIES, CALL 1-855-336-BOAT (2628)
Please review the flowering rush documents in the Agricultural Services Reference Library of this website for further information.