07/2555 - Operational Works - Drainage Stormwater Vegetation [As Published] · 142007.2555

Attunge Heights Rehabilitation Specification 13

6.0 WEED CONTROL

 

Weed control is an essential component of site preparation as it helps create the conditions
necessary to facilitate both the survival of planted stock and the accumulation of natural
regeneration. Weeds are currently the major limiting factor for natural regeneration on the site.
All plants listed as environmental weeds by the Queensland Herbarium or listed as Undesirable
Plant Species by Noosa Council are to be dealt with using the range of techniques outlined in this
section. A range of techniques are available for weed control and the Rehabilitation Contractor
selected will need to select the most appropriate for each species and scenario encountered in the
field. The restoration ecologist should take care when applying these techniques to avoid any
native plants particularly the native seedlings.

6.1 CONTROL METHODS

Generally, a glyphosate-based product is suitable for the control of most of the weed species
present on the subject site, however other non-residual herbicides may be necessary to effectively
control certain species (such as 2,4-D for the treatment of Mother-of-Millions). The addition ofa
registered surfactant can reduce volumes of chemical treatment required along with a marker dye.
Marker dyes are best employed outside of areas regularly viewed by the public as they can be
unsightly and lead to the misconception that dangerous chemicals are being applied.

The only chemical permissible within 10m of the centreline of the creek or edge of the freshwater
habitat is Roundup Bioactive. No spraying will be undertaken in any drainage lines when it is

carrying water.

Table 7 identifies the techniques that can be employed on the site and Table 8 identifies the
recommended techniques for the known species of weed occurring on site.

Table 7: Weed control methods

 

Hand Removal

Removal of small weeds by hand. To be employed for weeds where the entire
root system can be easily removed by hand whilst minimising soil disturbance.
Care is necessary to ensure seed is not disbursed. Plants likely to restrike (eg
Singapore Daisy) or set propagules should be removed from site.

 

Crown or underground stem removal

Employed for plants growing from a solid central crown below ground level such

as Asparagus speringia:

* a blade is used to severe the roots from the central crown;

* severing the attached roots and removing the crown or underground stem
with the plant;

= seed heads should be removed prior to crowning,

Cut material and seeds are to be removed from site.

 

 

 

 

 

 

Chenoweth EPLA 078103_Rehab_12_12_07.doc Dec ‘07