Current works

Helicopter spraying for pest plant control – Upper Waitaki rivers

Southern district

Environment Canterbury is carrying out its annual spraying programme in the Tekapo, Pukaki and Upper Ohau riverbeds, starting late-February, to help control woody weeds, including gorse, broom, lupin, willow, and alder.

This spraying benefits the flood carrying capacity of the rivers, as well as providing clear gravels for bird nesting and maintaining the unique character of the Mackenzie basin.

Property owners, recreational, and other users of the river are advised that herbicide spraying (glyphosate and triclopyr, along with added surfactant compounds) is scheduled to be undertaken at the sites shown below. The spraying is covered under resource consent with strict environmental controls.

Spray sites: 

Tekapo River 

•	Tekapo River – Delta above Lake Benmore, upstream to Grays River confluence

Delta above Lake Benmore, upstream to Grays River confluence

Tekapo River – Grays River confluence upstream to Edwards Stream confluence

Grays River confluence upstream to Edwards Stream confluence

Tekapo River – downstream of Tekapo township

Downstream of Tekapo township 

Pukaki River 

Pukaki River – Tekapo River confluence upstream to pylons

Tekapo River confluence upstream to pylons

Upper Ohau River

Upper Ohau River – 400m upstream of Lake Ruataniwha to below Lake Ohau outlet

400m upstream of Lake Ruataniwha to below Lake Ohau outlet weir

Sprays used:

  • Glyphosate (Roundup or equivalent)
  • Triclopyr (Grazon or equivalent)
  • Surfactant (Canola-based oil that helps herbicide ‘stick’ to plants, meaning less herbicide is required)

Spray application method:

Helicopter

When:

The work will start late-February and continue as weather permits until mid-March and will be clearly signposted.

Contact:

Hilary Fraser 027 702 1440.

 

Helicopter spraying for pest plant control – Lower Waitaki river

Southern district

Environment Canterbury is carrying out its annual spraying programme in the Lower Waitaki riverbed, starting mid-February, to help control willow and broom.

This spraying benefits the flood carrying capacity of the Waitaki River by ensuring that floodwaters are not impeded by excessive growth in the riverbed.

Property owners, recreational, and other users of the river are advised that herbicide spraying (glyphosate, along with added surfactant compounds) is scheduled to be undertaken between Duntroon and Kurow.

The spraying is covered under resource consent with strict environmental controls.

Spray site:

Waitaki River – Between Duntroon and Kurow

Waitaki River – Between Duntroon and Kurow

Sprays used:

  • Glyphosate (Roundup or equivalent)
  • Surfactant (Agpro Spray Gold Ultra – canola-based oil that helps herbicide ‘stick’ to plants, meaning less herbicide is required)

Spray application method:

Helicopter

When:

The work will start mid-February and continue as weather permits until mid-March and will be clearly signposted.

Contact:

Hilary Fraser 027 702 1440.