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Ship rat control in the Mahoenui Giant Weta Scientific Reserve 2019/2020

Kia ora tatou,

I am writing to inform you that the Department of Conservation will be using the toxin Diphacinone, in the form of cereal pellets and blocks (Pest-off 50D and D-Block for rats) in the Mahoenui Wētā Reserve. The bait will be placed in bait stations attached to trees and Warratahs in early October 2019. The operation will be conducted by DOC staff and is ongoing.

It is our standard practice to notify neighbours, local authorities, veterinarians, nearby schools and concessionaires.

The aim of this operation is the protection of the threatened Mahoenui Giant Wētā from predation by rats. A recent study into the stomach contents of rats caught in the wētā reserve found wētā remains in 90% of rats caught.

Warning signs will remind visitors of the risks associated with entering the Wētā Reserve. A map of the operational area and a fact sheet are enclosed, along with a formal notification letter.

Contact details are included in the attached information if you have any questions about this operation.

Ngā mihi, nā India Nicholls

Senior Community Ranger Department of Conservation | Te Papa Atawhai

Pureora Office,


07 878 1087 – Pureora Office Phone

027 281 4759 – Mobile

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