Source: Northland Regional Council
Biosecurity experts are asking for the public’s help to identify the locations of an invasive plant hiding in gardens around Kerikeri, Opua and Mangonui and in other Far North areas.
Mickey Mouse plant (Ochna serrulata) is an issue because it can form dense monocultures that prevent regeneration of native species, and it grows and reproduces prolifically in Northland’s mild climate.
Joanna Barr, Northland Regional Council’s Biosecurity Manager – Pest Plants, says Mickey Mouse plant was originally introduced and shared as a garden plant in New Zealand.
It is currently primarily found in urban gardens and unmanaged/disturbed areas, but it is spreading. “Its berries are inedible to humans but are very attractive to birds which spread the plants a considerable distance.”
She says now is a good time for people to be on the lookout for it as it comes into flower in spring and then starts to set its unusual looking fruit in November/December.
It has yellow buttercup-like flowers that are followed by distinctive red and black fruiting bodies.
These fruiting bodies are what give the plant its name because they resemble the face of Mickey Mouse, with black berry-like fruits perched on a red base. These are surrounded by what look like red petals.
Ms Barr says council’s Biosecurity team would like assistance from Far North residents in identifying possible locations of the plant, especially in the Kerikeri, Opua and Mangonui areas.
“These observations will help us determine the distribution of Mickey Mouse plant and help us in our battle to control this plant’s spread.”
Mickey Mouse plant is a shade tolerant shrub that is usually 1-2m tall. It has elongated oval leaves that are 13-50mm long and have finely-toothed margins. It has pimply-textured bark.
Ms Barr says anyone who thinks they have seen a Mickey Mouse plant should contact the Northland Regional Council’s biosecurity team on (0800) 002 004.
“We will have a Biosecurity Officer come out and check the site and if Mickey Mouse plants are found, will undertake control at no cost to the landowner.”
Mickey Mouse plant has a deep tap root which makes it almost impossible to remove manually, and it will often re-sprout if not controlled correctly.
“Please do not try and pull them out yourself or mulch them because this could spread the seeds.”
Ms Barr says one good feature about the plant is that it does not have long lived seed, which is a big advantage in eradicating it from a site.
