Warning about spread of kauri disease

Kuari dieback in the Waitakere Ranges in 2008. Photo / Glenn Jeffrey

People heading into the bush in summer have been urged to do their bit to stop the spread of a disease which is killing kauri trees.

Kauri dieback, known scientifically as phytophthora taxon agathis, is a microscopic fungus-like plant pathogen that affects only kauri. Foliage turns yellow, trees lose leaves, the canopy thins and branches die. Trees can also develop lesions that bleed resin, extending to the major roots and sometimes girdling the trunk as a "collar rot".

Last year the Government funded the long-term management of the disease and the Kauri Dieback Management Programme was formed.

John Sanson, from the new body, said the disease was spread by soil movement and there were simple things people could do to help prevent it.

People should keep to defined tracks in parks and reserves and keep off kauri tree roots. Before entering or leaving areas of kauri forest, they should also clean footwear, tyres and any equipment that comes into contact with soil.

Mr Sanson said the disease was a serious threat to kauri, one of New Zealand's most treasured species and people needed to be vigilant to prevent it from having devastating effects.

- NZPA