Risk analysis for the release of Cecidochares connexa for the biological control of Chromolaena odorata

We conducted a risk analysis for the proposed release of the gall fly Cecidochares connexa into Australia. The purpose of this release would be to control Chromolaena odorata (Siam weed).

Use of exotic biological control agents has been common in Australia for many years. They are a tool for controlling weeds, invertebrate pests and other organisms. Release of pathogenic, herbivorous, predatory or parasitic organisms into the Australian environment can have potential for “off-target” risks. This means risk to other plants or invertebrates not targeted by the release.

We began this risk analysis in response to an application to release Cecidochares connexa. The application was submitted by the Queensland Government Department of Agriculture and Fisheries (QDAF). Their application included the results of host specificity testing.

We have now released a final report, which:

  • estimates off-target risks and potential consequences of the release
  • evaluates the risk to be Negligible, which meets Australia’s appropriate level of protection (ALOP)
  • recommends the release of the biological control agent Cecidochares connexa.

We conducted a risk analysis for the proposed release of the gall fly Cecidochares connexa into Australia. The purpose of this release would be to control Chromolaena odorata (Siam weed).

Use of exotic biological control agents has been common in Australia for many years. They are a tool for controlling weeds, invertebrate pests and other organisms. Release of pathogenic, herbivorous, predatory or parasitic organisms into the Australian environment can have potential for “off-target” risks. This means risk to other plants or invertebrates not targeted by the release.

We began this risk analysis in response to an application to release Cecidochares connexa. The application was submitted by the Queensland Government Department of Agriculture and Fisheries (QDAF). Their application included the results of host specificity testing.

We have now released a final report, which:

  • estimates off-target risks and potential consequences of the release
  • evaluates the risk to be Negligible, which meets Australia’s appropriate level of protection (ALOP)
  • recommends the release of the biological control agent Cecidochares connexa.