Myrtle rust found in new region – Manawatu
Myrtle rust has been detected in Manawatu for the first time, the Ministry for Primary Industries confirmed today.
The fungus was found on a young ramarama (Lophomyrtus) in a planted area off Victoria Esplanade in Palmerston North.
Myrtle Rust Response spokesperson Dr Catherine Duthie says operational activity will start immediately to try to contain
the disease.
“Hopefully, we have found it in this region early, which would give us a chance of trying to eliminate it or, at least,
slow down the spread there. We are swinging straight into action. The infected plant will be removed and securely
disposed of and one of our seven field surveillance teams will begin an intensive inspection of myrtle plants on all
properties within a 200 metre radius.”
“It is disheartening that myrtle rust has been detected in another region, but it is consistent with the expected
infection pattern.
“Residents can help, by checking the myrtle plants in their garden. At this time of year, the fungus is still in its
sporulation, or spreading, stage. This means it is very visible. Without touching the plant, you can look on either side
of the leaves and new shoots for any sign of a bright yellow, powdery eruption. Some leaves could also be buckled or
twisted, or look diseased with dry pustules that are grey or brown. It’s really important not to touch the plants or
brush against them, as this can disrupt the spores and speed up its spread.”
Any suspected cases of myrtle rust can be reported to the Biosecurity Hotline (0800 80 99 66). MPI will investigate
suspected cases, track and monitor its spread, and collect information to help understand the disease’s impact on New
Zealand.
At 19 March, there has been a total of 409 properties affected by myrtle rust on mainland New Zealand: Northland (four
properties), Auckland (63), Waikato (33), Bay of Plenty (92), Taranaki (200), Manawatu (1) and Wellington (16). In the
last couple of weeks, most detections have been in Taranaki and Auckland.
There have been no detections in the South Island to date, although north-western areas were identified in climate
modelling of being at a high risk from spores carried on the wind from Australia.
ends