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.

Area map of the Clarence Reserve TMAThe Clarence Reserve TMA

The Clarence Reserve TMA covers 127,660ha at the northern end of the Canterbury Region. It includes:

  • the catchment of the Clarence River from the mouth to Spay Stream
  • the southern end of the Clarence Reserve between the Seaward and the Inland Kaikoura Ranges, and

The habitat is river flats and rolling hills to high ridgelines, with scrub- and bush-filled gullies as well as areas of continuous bush. Altitudes range between sea level and 2,500m.

History of TB and pest control in Clarence Reserve

There has been a long history of TB infection in both local wildlife and cattle herds in the Clarence Reserve TMA. Possums, ferrets and deer in this TMA have been diagnosed with TB infection.

Previous possum control and livestock disease management has reduced the number of infected herds in the North Canterbury/Marlborough region. However, our monitoring has shown that we need to do further control work in the Clarence Reserve area to reduce the possum population. This will:

  • minimise the risk of the disease spreading through wild animal populations into farmed cattle and deer
  • ensure further good progress towards eradicating TB.

We've completed ground based possum control in:

  • Clarence East
  • Clarence West
  • Clarence Reserve
  • Kekerengu
  • Upper Clarence.

The most recent ground control operation was completed in 2020/2021. We also did ferret surveys in the Clarence West and Kekerengu blocks in 2018.

Current state

There are no infected herds in this TMA. 

If you're moving animals

The Clarence Reserve TMA is in the Marlborough / North Canterbury Movement Control Area (MCA). That means TB testing is required for cattle and deer before they're moved to another herd or farm.

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 Clarence Reserve 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
Aerial control20219,700haConstitution Hill
Ground control2021/202238,300haClarence East, Clarence Reserve, Clarence West, Constitution Hill, Kekerengu, Upper Clarence, Waiautoa
Aerial control202236,000haCentral Clarence, Clarence Reserve
Ground control2022/20235,500haClarence East, Clarence Reserve
Aerial control202326,800haClarence Reserve, Clarence West, Kekerengu, Waiautoa
Ground control2023/202421,700haClarence East, Clarence Reserve, Clarence West, Constitution Hill, Kekerengu, Upper Clarence, Waiautoa


Excell Biosecurity manages our pest control operations in Clarence Reserve. Contact them directly if you have feedback or questions about upcoming operations.

Excell Biosecurity
Phone: 0508 392 355

Your nearest local OSPRI office is in Christchurch.

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