Kauri dieback is an invasive disease caused by the fungus-like pathogen Phytophthora agathidicida. It spreads with soil movement, including on footwear and other clothing and gear, on vehicles driven in affected areas, by animals – including wild pigs, stock and pets.
As far as we know there is no kauri dieback disease in the Gardens but since we have a large number of kauri in the Gardens we are watchful. We ask that, if you have been in an area of NZ where this disease is known to exist, you change your shoes before entering the Gardens.
Infected kauri trees may show a white lesion on the trunk, later their leaves may turn yellow and the canopy thins, before they eventually die. See the below link for more information.