NSW National Parks and Wildlife Service
Environment Australia, June 2001
ISBN 0 7313 62829
Weed invasion is a significant issue at ten of the twenty-nine known Bathurst Copper Butterfly habitats. The control of weeds is determined by their proximity to the habitat used by the Bathurst Copper Butterfly and mapped as part of the Site Descriptions. For weeds outside of the Bathurst Copper Butterfly habitat, control should be by conventional means and is the responsibility of the relevant land owner or manager. For weed control within the actual area of mapped habitat the guidelines outlined below should be applied.
The NPWS will produce a map of the weed problem with the extent of weeds marked on the site aerial photo. The scale of this photo is 1:2,500 and allows for the accurate location of the habitat area and associated weeds.
The control programs will utilise bush regeneration techniques such as cut and paint method where the shrub is cut off close to the ground and herbicide, generally Roundup ” , applied to the cut stem. Hand removal of the weed could also be considered where it would not cause too much disturbance to adjacent Blackthorn or to ant colonies. Generally the optimum period for control works are when the weeds are actively growing, November to March, depending on the seasonal conditions. For pine wildings, mature trees can simply be felled or where the site is sensitive, stem injection or ring-barking applied, and the tree left in situ.
Bush regeneration is labour intensive and may involve contract of such groups as the Australian Trust for Conservation Volunteers (ATCV) or local community volunteers. Alternatively, specialist bush regenerators can be contracted.
Priority for weed control will be given to the largest habitat areas with largest Bathurst Copper Butterfly sites regardless of tenure.
The NPWS are prepared to coordinate weed control programs within the limited areas of known Bathurst Copper Butterfly habitat. Application will be made for Threatened Species funding or other grant schemes. The NPWS and other departments will be expected contribute to the cost of control works on their lands.