To manage the water weed hornwort (Ceratophyllum demersum) in Lake Wiritoa, Whanganui District Council will spray herbicide in the public swimming and water skiing areas Herbicide spraying will take place at Lake Wiritoa on Wednesday, 27 January 2021.
A boat-mounted spray unit will be used to spray Reglone herbicide, which is specifically formulated for use on submerged aquatic weeds.
Please do not draw water from the lake for bathing or drinking, or use for fish farming or watering livestock. The use of the lake for swimming is prohibited for 24 hours after application.
Additionally, please do not use water for overhead irrigation for 10 days after treatment.