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AILING KAURI ON THE AWHITU PENINSULA
Kauri dieback is caused by a pathogen known as Phytophora taxon Agathis (PTA). It is present in the great forests of Northland and is threatening the health of trees in the Auckland region where it is known to be present in the Waitakeres. Tricia Aspin has been working with biosecurity officers from DoC and ARC regarding ailing kauri on the Awhitu Peninsula. Further laboratory tests are to be done but unfortunately preliminary evidence from the Wattle Bay and Matakawau areas suggests it is probable that the disease is present here also. To assist further study please let Tricia know if you have noticed dead or ailing kauri. Bleeding of resin in a 'collar' near the base of the trunk and up the lower part, canopy yellowing and dieback of branches are symptoms. One, or several trees in a grove may be affected and some may have been dead for some time. It is very important to clean all footwear when moving from one area to another. Make sure all soil is scrubbed from footwear or best carry a small spray bottle containing Trigene (a biodegradeable disinfectant) or bleach and spray your footwear as you move through the bush. Information pamphlets are available at the Landcare office or view the ARC fact sheet here. You can also contact Tricia Aspin on (09) 235-1074. |