Wilding pines are trees that have spread from plantings made for the prevention of soil erosion and for commercial forestry. Various pinus species are spread by seed and are a problem in areas where native forest does not occur, such as above the bushline, in high country tussock grasslands and in low-growing coastal vegetation. They can displace native tussock grassland species and native shrublands, and are deemed by many to be an aesthetic problem.
Wilding pines are recognised as a weed in Australia. A range of infestations of wilding pines exists throughout New Zealand. Large areas of Marlborough are infested with Wilding Pine species, particularly in the Marlborough Sounds and in parts of South Marlborough.
For more information see:
For further information, please visit the Wilding Conifers website for more information and updates on what is happening around New Zealand.
Wilding conifers - drill and poison techniques
Traditionally, drilling and poisoning of wilding pine trees has predominantly been undertaken using herbicides such as glyphosate (Round-up), however a modified method using the herbicide metsulfuron has been trialled and found to be as effective, significantly faster and of a similar chemical cost to more traditional methods but requires far fewer holes per tree.
This method is also faster per tree than felling, especially with larger trees. The following information is intended to assist individuals, communities and agencies to achieve a cost-effective and time-efficient way of killing wilding radiata pine trees.