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Living Here
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  5. Water lettuce now under control at Reg Tanna Park duck pond
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Water lettuce now under control at Reg Tanna Park duck pond

Duck pond before image thumbnail

A popular Gladstone recreational area has returned to its former glory after the control of water lettuce from the duck pond at Reg Tanna Park.

Water lettuce (Pistia stratiotes) is a free-floating aquatic weed found in tropical countries which rapidly forms dense infestations that cover the surface of entire rivers, dams and irrigation channels.

Water Lettuce is considered a restricted invasive plant under the Biosecurity Act 2014 and must not be given away, sold, or released into the environment without a permit.

Gladstone Regional Council staff commenced work to control the water lettuce in August 2019, via a biological control being the introduction of weevils, which was monitored over approximately three months.

Unfortunately, during this period rain and heat provided ideal growing conditions where the water lettuce flourished, and Council conducted another round of biological control in December.

Continued monitoring took place during this time, and while the manual removal of the water lettuce was considered, it wasn’t deemed safe enough to undertake.

Due to the severity of the water lettuce and the weevil not acting quickly enough, Council made the decision to treat the water lettuce by approved chemical control specifically designed for aquatic areas.

Gladstone Region Councillor Chris Cameron said this period of chemical control was conducted in stages as to not cause detrimental effects to the water quality and ecosystem.

“The period of chemical control began in February and took place every fortnight,” Councillor Cameron said.

“Council staff were very mindful of fish and other animals in the area, as well as other water plants, to ensure they were only targeting the water lettuce.

“The decision to use chemical control wasn’t made lightly, as Council undertook alternative control methods prior to this decision.”

Cr Cameron said there was a possibility the water lettuce could return, as seeds can remain dormant for some time, but added that Council will regularly monitor the pond.

Duck pond before image

Before picture taken January 2020

Duck pond after image

After picture taken June 2020

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Published: 15th June 2020

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Living Here

SELECT
  • Pets and Animals
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  • Residents
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    • Glad to be in Gladstone
    • EzyBill
    • Pay, Apply and Report
    • Mapping
    • Rates
        BackRates
      • About You
      • Financial Hardship
      • Forms and Policies
      • My Rate Notice
      • Objection to Rating Category
      • Outstanding Rates
      • Payment Options
      • Pension Concession
      • Rates Explained
      • Substituted Service
      • Utility Charges
      • FAQs
    • Regulated Parking
    • Update Your Details
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        BackWaste and Recycling
      • Landfill Bin and Waste Disposal
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      • Recycle Mate
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    • Water Meters
    • Water Wise
  • Report
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    • Abandoned Vehicles
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Gladstone Regional Council would like to acknowledge the Bailai, the Gurang, the Gooreng Gooreng and the Taribelang Bunda people who are the traditional custodians of this land. Gladstone Regional Council would also like to pay respect to Elders both past, present and emerging, and extend that respect to other Aboriginal and Torres Strait Islander people. Learn more about Council's Reconciliation Action Plan (RAP).

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