Reed sweetgrass, Marlborough

Reed sweetgrass (Glyceria maxima) is a containment pest plant in the Marlborough District Council Regional Pest Management Strategy.  It infests waterways with a thick tall grassy growth that inhibits native plant growth and blocks water flow. The goal was to contain the infestation to a lagoon on the Marlborough Plains, while eliminating other infestations over time. We have greatly reduced the biomass of the plant and the volume of herbicide used for its control. Native raupo and wetland grasses in the lagoon are now spreading, enhancing habitat for fish and eels.
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