In a boost to efforts to combat Chilean flame creeper, Environment Southland has welcomed the EPA’s decision to allow the release of Blaptea elguetai, a beetle that feeds on the weed’s leaves and will assist in its control.

Environment Southland Biosecurity Team Leader Plants Jolie Hazley said the decision marks a significant step forward in managing pests within the region.

“Chilean flame creeper has become a significant threat to Murihiku Southland’s biodiversity. The EPA’s approval means we now have an environmentally responsible, long-term tool that will help reduce its impact across the region and beyond.”

Chilean flame creeper (Tropaeolum speciosum) spreads rapidly and smothers native vegetation. It is widespread in Southland, Otago, and Canterbury, and is increasingly found in parts of the North Island, and the Chatham Islands.

“Biocontrol agents give us another tool in the toolbox. They complement the more traditional control methods such as hand‑pulling and applying herbicides which can be labour‑intensive, can damage surrounding vegetation, and often fail to reach inaccessible areas.”

Late last year, Environment Southland applied for approval on behalf of the National Biocontrol Collective, with Manaaki Whenua – Landcare Research providing scientific support.

“Biological control is a well‑established and safe method for managing invasive weeds in New Zealand. We have already released biocontrol insects in Southland for broom, ragwort and thistles to help reduce the harm these pests cause.

“Biocontrol won’t eradicate the plant entirely, but it will reduce its vigour and spread to an acceptable level. This means healthier native ecosystems and less ongoing pressure on landowners and councils to control infestations,” Jolie Hazley said.

Environment Southland will now work with national partners to plan the next steps.

“We hope to release them in Southland soon and further releases will happen across Aotearoa New Zealand once further mass rearing has been done.”