39 EMROP: Waihi North Project WAI-985-000-PLN-LC-0001_Rev0 clean • The complete host range for PA is not known and it is possible that other plant species may host the pathogen. Infection of a kauri tree with PA causes damage to the vascular tissues and prevents the tree from accessing the water and nutrients that it requires. Infected trees may display the following symptoms of stress: • Bleeding gum and lesions on trunk • Leaf yellowing and loss • Branch loss (as opposed to naturally loss of lower branches) • Canopy thinning 3.2.1 Purpose of kauri protocols The purpose of this Plan is to prevent and minimise any Project-mediated transmission of PA. It provides measures to prevent transmission of PA during the the life of the Project. 3.2.2 Kauri presence within the Waihi North Project Kauri trees occur occasionally throughout the WNP area, where they mainly form components of selected planting mixtures. Some relict trees occur in the surrounding landscape and a small stand occurs on a northern projection of the southern fragment of SNA 166. There is one naturally occurring kauri tree within the proposed footprint of TSF3 and no kauri trees within the WNP area are known to exhibit any PA symptoms. Overall, the risk of presence of PA within the WNP area is low, and the risk of spread beyond it is low. However, precautionary testing should be undertaken. If testing confirms PA presence, the area will be designated a PA Management Area and kauri hygiene protocols (Section 3.2.4) will be followed. 3.2.3 Identification of PA Infection PA is currently not known within the WNP area. However, the following precautionary actions will be undertaken at TSF3 and all planted areas that support kauri trees: PA is an unwanted organism under the Biosecurity Act 1993. In accordance with section 52 of that act, no person shall knowingly communicate, cause to be communicated, release, cause to be released, or otherwise spread the organism.
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