Myrtle Rust (also known as guava rust and eucalyptus rust) is a rust disease that has recently been found in New Zealand. It has the potential to be a serious threat to plants of the myrtle family including pohutukawa and manuka.
Myrtle rust only affects plants in the myrtle family (see Did You Know). Generally attacking soft, new growth, including leaf surfaces, shoots, buds, flowers, and fruit.
Some leaves may become distorted and die off.
If you think you see the symptoms of myrtle rust:
If myrtle rust is positively identified, follow the following to remove affected plants or parts of plants:
Based on Australian, Hawaiian and Brazilian work, MPI have included myclobutanil as being effective against myrtle rust infections. Myclobutanil is systemic, curative and protectant.
Myrtle rust (Austropuccinia psidii) is also known as guava rust and eucalyptus rust. Myrtle rust only affects plants in the myrtle family. The Myrtle family (family Myrtaceae) includes:
See a full list of myrtle rust susceptible plant species.
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