Pests and diseases

Kauri dieback disease

A Kauri Tree with bleeding lesion.
A Kauri Tree with bleeding lesion.

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

Reports of kauri deaths in the Waitakere ranges in 2007 prompted an investigation by the late Dr Ross Beever (Landcare Research) and Dr Nick Waipara.

This work led to the discovery of kauri dieback, a new disease to science. This disease is spread via spores in the soil and can kill kauri trees of all ages.

Little is known about the disease and management of parks has been directed toward minimising the spread of soil in an effort to prevent the spread of the disease.

In 2008, kauri dieback disease was pronounced an unwanted organism by MAF, prompting the formation of a joint agency response and the Kauri Dieback Management team.

Auckland Council is a key partner and works to 'keep kauri standing' within the Auckland region.

To find out more about the national response to kauri dieback visit www.kauridieback.co.nz.


On this page you can find:
What does kauri dieback do to kauri trees?
Where is kauri dieback in the Auckland region?
How can we protect healthy kauri?
What is Auckland Council doing to help?

 


What does kauri dieback do to kauri trees?

Symptoms include:

  • yellowing of foliage
  • loss of leaves
  • canopy thinning
  • dead branches.

Affected trees can also develop lesions that bleed resin, extending to the major roots and sometimes girdling the trunk as a 'collar rot'.


Where is kauri dieback in the Auckland region?

Areas of disease:

  • Waitakere Ranges
  • Great Barrier Island
  • Okura
  • Albany Scenic Reserves.

Kauri dieback has also been found on many private properties throughout the Auckland region.


How can we protect healthy kauri?

Clean your shoes before and after visiting our Kauri forests.
Clean your shoes before and after visiting our Kauri forests.

The Hunua Ranges, Waiheke Island and many other Hauraki Gulf Islands (Kawau, Hauturu, Motutapu, Ponui) are healthy kauri areas. You can help us keep it this way.

Please don't bring soil into these areas and use cleaning stations where available.

Clean your footwear, tyres and equipment before and after you leave an area where kauri are present and stay on the tracks and off kauri roots.

 


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)
  • aerial survey and ground-truthing throughout the entire Waitakere Ranges and adjacent forest with kauri (2010-2011)
  • over 100 phytosanitary stations and signage designed and positioned to minimise the spread of the disease by trampers
  • private property inspections to over 350 landowners in the Auckland region
  • kauri care guide developed for landowners
  • trial control treatments on private properties
  • advocacy work on regional parks during peak summer periods
  • an intensive pig control programme in the Waitakere Ranges
  • trial track closures over high risk periods in the Waitakere Ranges, with tracks upgraded and re-routed in high risk areas.

Auckland Council also conducts and assists research projects that:

  • develop control tools for the treatment of the disease
  • look at long term impacts of kauri dieback disease to forest ecology
  • conduct vector research (how and what is spreading kauri dieback)
  • diagnostics and detection research (e.g. how to detect kauri dieback from infected trees, contaminated soil and water)
  • applied disease management of kauri dieback (how to contain and mitigate impacts of kauri dieback)
  • fundamental biology and pathology of Phytophthora related to kauri health
  • assisting external researchers undertaking national research programmes.