Parasitic Worms vs Invasive Millipedes in Wellington

Parasitic Worms vs Invasive Millipedes in Wellington

Residents in Wellington's south coast are facing an increasing threat from invasive Portuguese millipedes. These scaly black creatures are emerging from the soil and invading homes, gardens, and even beds, causing significant disruptions. While the Portuguese millipede is considered a nuisance rather than a pest, residents are taking proactive measures to combat the infestation.

A Ōwhiro Bay resident has planned to release an aggressive species of parasitic worm, Heterorhabditis bacteriophora, to suppress the millipede population. These microscopic worms reproduce inside their hosts and eventually emerge, killing them. The resident hopes this approach could potentially reduce the numbers significantly and shared their experience with Radio New Zealand.

A trial using Steinernema feltiae as a biocontrol agent is currently underway at Victoria University, with results expected in a few weeks. Meanwhile, residents are already taking action, spraying the microscopic worms to combat the growing infestation.

Portuguese millipedes tend to emerge in greater numbers during autumn and spring, leading to a surge in sightings. Residents are preparing for a period of increased activity before the population begins to decline. This story highlights the challenges of managing invasive species and the innovative methods residents are using to address the issue.