Environmental issues

Pests and weeds

Staged approach to bitou bush control

At many sites the density and area infested by bitou bush is such that it cannot be eradicated in a single control event. In addition, control in many instances needs to be targeted  to the biodiversity at risk in the first instance. Thus the Bitou Bush TAP outlines a staged approach to bitou bush control.

First control stage

The first stage of control is the removal of bitou bush and other weeds near the priority species, populations or ecological communities. This reduces the direct threat in the short-term.

Second control stage

The second stage is the expansion of stage one to cover a larger area of the bitou bush infestation. Removal of bitou bush should be targeted at areas containing suitable habitat into which the priority species, populations and ecological communities can expand in the future. Stage two also involves the follow-up control of bitou bush seedlings that germinate within previously controlled stage one areas.

Third control stage

The third stage of control is the further expansion of earlier stages with the aim of removing all bitou bush from the site and surrounding areas to prevent re-invasion. This stage also includes the continual follow-up control of bitou bush seedlings in all previously controlled stage one and two areas of the site.

Example of staged control

The following diagrams show an example of a staged program for the control of bitou bush. Figure A shows the location of two priority species (Plectranthus cremnus and Zieria prostrata) and a priority ecological community (Themeda Grassland) relative to the distribution of bitou bush. Figure B shows the three stages of control, following the TAP approach.

Further information on staged control can be found in Chapter 7 of the threat abatement plan.

Figure A. Location of the priority biodiversity and bitou bush

bitou bush site map

Figure B. Location of the 3 stages of control

Map of bitou bush distribution, TAP biodiversity, and the planned stages of control

Page last updated: 26 February 2011