Source: Environmental Protection Authority
The Environmental Protection Authority (EPA) has approved the release of a leaf-feeding beetle (Blaptea elguetai) as a biological control agent to combat Chilean flame creeper (Tropaeolum speciosum), an invasive weed in Aotearoa New Zealand.
Chilean flame creeper is an invasive pest plant that spreads quickly and smothers native plants. It is now a threat in many regions, especially Southland, Otago, and Canterbury. It can be found on Stewart Island/Rakiura and the Chatham Islands. It is also becoming a problem plant in Manawatū-Whanganui.
Environment Southland, on behalf of the National Biocontrol Collective, applied to import the beetle as removing the weed by hand or using herbicides is not very effective, takes a lot of time, and can harm nearby plants.
EPA Acting Manager of New Organisms and International Applications, Peter Day, says the leaf-feeding beetle offers a low-maintenance solution that can reach areas that are hard to access.
“The decision to approve introduction of this organism was made by an independent decision-making committee, which follows a rigorous, evidence-based assessment.
“The risk assessment provided by the applicant showed that the Chilean flame creeper leaf beetle is highly unlikely to harm native plants or animals. It also does not bite or sting, so there is no health risk to people.”
Mr Day says the decision followed public consultation, engagement with mana whenua, and consideration of international best practice.
“New Zealand has a strong track record of using biological control agents to manage invasive weeds with minimal impact on native ecosystems.”
In recent years the EPA has approved other biocontrol agents for weeds such as Darwin’s barberry, purple loosestrife, old man’s beard, Sydney golden wattle, and moth plant.
