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 or wildlife. Each TMA has a specific TB control plan designed to eradicate TB as effectively as possible.

The Grey TMA

Map showing boundaries of Grey TB management areaThe Grey TMA covers 99,224 hectares east of Greymouth, between the Taramakau and Grey Rivers. The area includes the Arnold Valley, Lake Brunner, Inchbonnie, Taramakau Valley and Moana Township. Public conservation areas include the Peter Ridge, Mt Te Kinga and the Hohonu Range.

The habitat is narrow strips of farmland interspersed by moderate to high hills, covered with podocarp bush and scrub areas. Altitudes range from sea level to 1200 metres on the Hohonu Range.

History of TB and pest control in the Grey TMA

In 2007, TB-infected possums were found behind Greymouth at Boddytown, and a TB-infected pig was identified from the Hohonu Range in 2010.

Since 2012 we have completed ground-based possum control throughout the area.

We undertook aerial control in:

  • Moana North aerial in 2011
  • Hohonu aerial, Marsden East aerial and Te Kinga aerial in 2012, and
  • Kaiata South block in 2013.

Current state

There are no infected herds in the Grey TMA.

If you're moving animals

The Grey TMA is in the West Coast Movement Control Area. 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 2022 to June 2023.

Dates and control methods for pest control operations in the Grey 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 control2022/20237500haInchbonnie, Rotomanu Buffer
Ground control2023/202432,500haArnold Valley, Bell Hill, Marsden West, Taramakau
Pig survey 2023/202423,000haKaiata South, Marsden East
Aerial control2024/202513,300haHohonu
Ground control2024/20254500haInchbonnie, Rotomanu Buffer
Pig survey 2024/20259100haKaiata South

Map of 2022/2023 pest control operations

The proposed area for ground control is marked on the map in green.

Interactive map showing Grey TB management area boundaries, Vector Control Zone, and proposed control areas


Vector Control Services manages eradication activities in the Grey TMA. Contact them directly if you have feedback or questions about upcoming operations.

Vector Control Services

Phone: 0508 141 268

Nearest local OSPRI office

OSPRI Greymouth office
PO Box 535
Greymouth 7840
Phone: 03 769 9098