Biosecurity

Kauri dieback disease

A kauri tree with bleeding lesion
A bleeding lesion on a kauri tree.

Kauri dieback is a deadly disease killing kauri trees throughout the Auckland region.

This fungus-like disease is spread via spores in the soil, and can kill kauri trees of all ages.

Scientists are working to find control tools for the disease, but there is currently no known treatment.

Auckland Council is a key partner in the joint agency Kauri Dieback Management Programme. We are working to 'keep kauri standing' within the Auckland region.


What are the symptoms?

Thinning kauri canopy
Thinning kauri canopy.

The symptoms of kauri dieback include:

  • thinning canopy
  • yellowing leaves
  • dead branches
  • bleeding gum at the base of the trunk.

Nearly all infected kauri die.

 

 

 


How can we protect healthy kauri?

Shoes being cleaned before visiting a kauri forest
Clean your shoes before and after visiting our kauri forests.

Even in infected areas like the Waitakere Ranges, there are many pockets of healthy kauri that we can protect.

The Hunua Ranges, Auckland's northern regional parks, Waiheke Island and many other Hauraki Gulf Islands (Kawau, Hauturu, Motutapu, Ponui) are healthy kauri areas.

You can help us keep it this way:

  • Don't bring soil into kauri areas.
  • Clean your footwear, tyres and equipment before AND after visiting our kauri forests.
  • Use cleaning stations every time you pass one as you walk in our parks.
  • Stay on the tracks, and off kauri roots.

What tracks and reserves are closed due to the disease?

We have established 'kauri protection zones' to protect healthy kauri that remain. As a result, the following tracks and partial tracks are closed:

Waitakere Ranges

  • Robinsons Ridge Track
  • Chateau Mosquito
  • RGB Track 
  • Walker Kauri Track
  • Manchester Unity
  • Taumata Track
  • Lucy Cranwell Track
  • La Trobe Track
  • Nuggets Track
  • Crusher Pipeline Track
  • Nihotupu Ridge Track
  • Summit Track
  • Farley Track
  • Bob Gordon Track

Hunua Ranges Regional Park

  • Mangatangi Trig Track (East)
  • Tapapakanga Stream Track
  • Colonel Sanders Track
  • Informal track around Camp Adair

Other reserve closures

DOC closed the Mataitai reserve (near the Hunua Ranges) in March 2012 to protect the healthy kauri within the reserve.

In March 2015, Albany Scenic Reserve was closed to contain a significant area of infected forest.


What is Auckland Council doing to help?

Auckland Council is working hard to manage the disease within the Auckland region. This work has included:

  • a kauri health survey throughout the Waitakere Track Network (2008-2010 and 2014-2015) and Hunua Ranges (2010-2011)
  • aerial survey and ground-truthing throughout the entire Waitakere Ranges and adjacent forest with kauri (2010-2011), Hunua Ranges (2011-2012), Great Barrier Island (2012-2014) and the Hauraki Gulf Islands of Kawau, Ponui and Waiheke (2013-2014)
  • aerial surveillance of Little Barrier Island/Hauturu (2014)
  • over 100 phytosanitary stations and signage designed and positioned to minimise the spread of the disease by trampers
  • private property inspections to over 500 landowners in the Auckland region
  • developed an education resource for schools and a kauri care guide for landowners
  • working with landowners to trial control treatments on private properties
  • advocacy work on regional parks during peak summer periods
  • an intensive pig control programme in the Waitakere Ranges
  • establishing 'kauri protection areas' with associated track closures in the Waitakere Ranges and Hunua Ranges to protect healthy kauri trees
  • tracks upgraded and re-routed in high risk areas
  • public awareness programme to work with communities to protect local kauri.

Auckland Council also conducts and assists research projects that investigate:

  • what is spreading kauri dieback, and how
  • how to detect kauri dieback from infected trees, contaminated soil and water
  • how to contain and mitigate impacts of kauri dieback
  • control tools for treating the disease
  • changes in engagement and behaviour as a result of management measures
  • long term impacts of kauri dieback disease to forest ecology
  • fundamental biology and pathology of Phytophthora in relation to kauri health
  • national and relevant international research programmes.
For more information about this disease and how we're working to save our kauri forests, visit the Keep Kauri Standing website.

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