Eradicating bovine TB in NZ

As part of our TBfree programme we deliver our pest control operations through a framework of TB management areas (TMAs). TMAs are areas with known TB infection in livestock and wildlife. Each TMA has a specific TB control plan designed to eradicate TB as effectively as possible.

The West Coast Divide TMA

The West Coast Divide TMA covers 167,900 ha from the Upper Grey River to the Hokitika and Mungo Rivers. The area includes Hochstetter Forest and the catchments of the Haupiri, Waiheke, Tutikuri, Trent and upper Taramakau Rivers. It also includes the Alexander, Kelly, Aicken, Campbell, Bald, Newton and Toaroha Ranges.

The habitat includes podocarp and beech forests with some patches of scrub, with alpine and subalpine plant types at higher altitudes. Altitudes range from 100 metres to 2000 metres.

History of TB and pest control in the West Coast Divide TMA

Recent wildlife surveys confirmed TB presence in the possum populations in the Waiheke, Haupiri and Upper Taramakau Catchment areas. TB has also been found in wild deer and West Coast strains of TB have shown up in the Canterbury side to the east of this TMA.

We completed aerial possum control in:

  • the Upper Aharua South block in 2009
  • the Alexander Range in 2012
  • the Taipo East block in 2013
  • the Hochstetter block in 2014, and
  • the Taramakau Valley block in 2016.

We undertook ground-based possum control in:

  • the Upper Ahaura and Taramakau blocks in 2019
  • Taramakau Valley, Upper Ahaura North in 2019/2020, and
  • Taramakau Valley in 2020/2021.

Some areas such as Newton Range and Upper Kokatahi have had very little or no control.

Current state

As a direct result of contact with infected wildlife there are infected herds in this TMA.

If you're moving animals

The West Coast Divide TMA is in the West Coast Movement Control Area (MCA). Before you move cattle or deer to another herd or farm, you must have them tested for bovine TB. 

Future pest control operations

We plan our pest control operations up to 3 years in advance. The current year runs from July 2021 to June 2022.

Dates and control methods for pest control operations in the West Coast Divide TMA are provisional and subject to change. If you’re affected by any upcoming operations, our pest control contractors will contact you before work begins. They will:

  • talk you through the specifics of each operation
  • explain what you need to do before the operations start
  • get your consent for the work to be done.
Type of controlWhenCoverageWhere
Ground control2021/202212,500haTaramakau Valley, Upper Ahaura North, Nancy, Upper Ahaura South
Aerial control2021/20227300haOtira
Aerial control202298,000haOtira, Taipo South
Aerial control2022/202317,000haHochstetter
Ground control2022/202312,800haTaramakau Valley, Upper Ahaura North


Vector Free Marlborough manage eradication activities in the Southern Paparoa Range TMA. Contact them directly if you have feedback or questions about upcoming operations.

Vector Free Marlborough Limited
Phone: 0508 548 008

Your nearest local OSPRI office is in Christchurch.

OSPRI Christchurch Office
PO Box 8674
Christchurch 8440
Phone: 03 363 3090