Kauri Locations

See a larger image of the Kauri locations map (4.35MB).

The above map displays sites identified from surveillance that have been targeted for follow up ground work by landowners and land managers to confirm the presence of kauri dieback disease (Phytophthora agathidicidia – or PA). It covers the period from 2009 until August 2018*.

‘PA positive’ refers to areas that have undergone ‘ground-truthing’ (or further testing on the ground following aerial surveys) which have returned a positive test result confirming the presence of the disease.

‘PA undetected’ refers to sites that have been tested for kauri dieback disease, but have not shown its presence. However, because the disease can lie hidden for many years before being detectable, it is possible that these sites could be infected and are not yet displaying symptoms. Alternatively, they may become infected at a later date unless everyone remains vigilant.

‘PA not assessed’ refers to areas where trees have been visually checked, and where tree data has been collected, but no soil sample was required to be taken. These areas will however continue to be monitored over time.

*Note: The map includes the most up to date information that has been supplied to Biosecurity New Zealand by Kauri Dieback Programme partners. This includes the Department of Conservation, tangata whenua, Auckland Council and the Northland, Waikato and Bay of Plenty Regional Councils. But as testing work is still ongoing in many areas, the picture of PA spread will change over time as more information is made available. We are also working with Auckland Council to obtain more up to date data, which is for the period up until 2015.

Aerial Surveillance

See a larger PDF of the Aerial Surveillance map (1.94MB). 

A key component of locating infected kauri trees using aerial surveillance is recognising symptoms. Symptoms of kauri dieback disease include thinning canopy and yellowing of leaves. However, these symptoms may also be caused by other things such as drought, poor soil conditions, high winds, cattle and other animal movement under the tree.

Surveillance has involved flying at a low level across the countryside, taking nearly a million photographs and covering an equivalent distance to one circuit of the Earth.


Find out more about our Surveillance and Detection techniques and research.