A reserve on Auckland's North Shore is being shut to prevent the spread of kauri dieback, and the closure of other conservation land is not being ruled out.
The Albany Scenic Reserve, which covers 40 hectares, has dieback spores.
Trees next to the track that leads into the reserve are visibly infected with dieback.
Conservation Minister Maggie Barry said the risk of someone spreading the disease from Albany into the reserve could not be ignored.
She said the Department of Conservation (DOC) would also spend $10 million upgrading tracks around kauri forests in the hope of containing the disease.
Almost $22 million is being spent on track improvements and operational costs over the next four years.