Help protect kauri this summer

People heading out to enjoy the bush this summer are being asked to do their part to limit the spread of the newly identified disease, Phytophthora taxon Agathis (PTA), which is attacking kauri trees.

Fiona Bancroft, Kauri Dieback Joint Agency Response Manager, said the disease was believed to be spread by the movement of soil and soil water.

"We need public help to stop the disease spreading further. There are simple things people can do to prevent further spread.

"As a precaution, people should stick to defined tracks in parks and reserves, clean their footwear, tyres and any equipment that comes into contact with soil before and after leaving areas of kauri forest, and avoid disturbing the roots of kauri trees.

"It's especially important for people moving between areas of kauri forest as there are some areas, such as the Coromandel ranges, that aren't showing signs of the disease and we want to keep it that way," she said.

"This disease is a serious threat to kauri, and we all need to be vigilant to prevent it from having devastating effects."

"Kauri forests are an essential part of New Zealand's ecosystem and home to many other trees, plants and threatened wildlife. We don't want to lose this iconic species to this disease. We all need to act now to prevent its spread."

The Kauri Dieback Joint Agency Response is made up of MAF Biosecurity New Zealand, the Department of Conservation, the Auckland Regional Council, Northland Regional Council, Environment Bay of Plenty and Environment Waikato.

The group is currently undertaking research to find out more about PTA, how it spreads, and what can be done to stop it.

"There is a lot we don't know about this disease and it's essential we find out more about it to make sure we are taking the best approach," said Ms Bancroft.

"We are also erecting signs across the natural range of kauri, and have set up a website, www.kauridieback.co.nz and an 0800 number (0800 NZ KAURI). Over the coming months we will also be engaging with iwi, local councils, industry and forest user groups across the North Island."

PTA is specific to kauri and can kill trees of all ages. Affected trees show yellowing leaves, canopy thinning, dead branches and lesions that bleed resin across the lower part of the trunk.