Introduction

Biosecurity helps to prevent damage caused by unwanted organisms. These include animal pests, weeds, didymo, and diseases like kauri dieback.

New Zealand has a unique ecosystem. Our native species once thrived without any native predators. However many introduced predators and pests arrived with humans, and threaten the survival of our native species.

Biosecurity helps to prevent or reduce any damage caused by unwanted organisms.

What is biosecurity?

Biosecurity is about keeping New Zealand free of unwanted organisms and for controlling, managing or eradicating them should they arrive in the country.

Who is involved?

DOC manages 8 million hectares of land, about 30% of New Zealand's land area. We are responsible for preserving and protecting these areas, including managing threats from invasive pests and diseases.

The Ministry for Primary Industries (MPI) leads New Zealand's biosecurity system. It is tasked with a "whole of system" leadership role, encompassing economic, environmental, social and cultural outcomes.

Biosecurity on the MPI website

You can help

Keep a watch for anything that is potentially an unwanted pest or disease.

Report any sightings to the MPI free 24 hour emergency hotline 0800 80 99 66.

Freshwater pests and didymo

Check, Clean and Dry between waterways logo.
Check, Clean, Dry to help prevent the spread of didymo and other freshwater pests

Freshwater pests include waterweeds, pest fish, the eggs and fry of pest fish, and the invasive alga didymo (Didymosphenia geminata). They can 'hitch a lift' on boating and recreational equipment and start new pest infestations.

To prevent the spread of freshwater pests always Check, Clean, Dry all boats and recreational equipment between waterways.

Report any sightings to the MPI hotline 0800 80 99 66.

Guidelines to prevent the spread:

Kauri dieback disease

Save our kauri forests poster from the Kauri Dieback website - Stop the spread of kauri dieback disease: clean your gear and stay on the track.
Stop the spread of kauri dieback disease

Kauri dieback is a serious threat to kauri in the upper North Island. Keep on the tracks and clean your gear when visiting kauri forests.

Report any sightings to 0800 NZ KAURI (0800 695 2874).

Learn about kauri dieback.

Great white butterfly

The great white butterfly poses a major economic and environmental threat. This introduced pest is a threat to commercial and home brassica crops, and to native cresses.

Repot any sightings to the MPI hotline 0800 80 99 66.

Learn about the great white butterfly.

Myrtle rust

Myrtle rust on leaves. Photo © The State of Queensland (through the Department of Agriculture, Fisheries and Forestry, 2014).
Report any suspected sightings of Myrtle rust to MPI

Myrtle rust is a fungal plant disease, not yet in New Zealand, but expected to arrive at any stage. The rust has the potential to have devastating impacts on some special New Zealand species. DOC is working closely with MPI to prepare for this.

Report any suspected sightings to the MPI hotline 0800 80 99 66.

Learn about myrtle rust.

Pest-free islands

If you are visiting pest-free islands, make sure you complete any biosecurity requirements to prevent unwanted pests coming with you.

Report any sighting of pests on pest-free islands to the DOC conservation emergency hotline 0800 DOC HOT (0800 362 468).

Visiting pest-free islands.

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