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Medium_lillypilly Spots on Syzygium australae leaves

I purchased a fair few tube stock lilly pilly plants (Syzygium australae), approx. 40cm high, in early Autumn and planted them as a hedge. They were very healthy to begin with and grew well, but for the last month and a half I have noticed dots appearing on the leaves of each and every plant which I am concerned is myrtle rust. However, none of the plants have, or have ever had, any yellow spores form on these patches so could this be something else?

The dots appear as small black dots to begin with then grow in size and form a light centre. Some plants did recently get a little frost burnt on the tips of some leaves but other than that and the patches on the leaves, they seem okay. The leaves do not seem to be falling off, nor are they curling.

If it is myrtle rust, does the treatment permanently fix the issue or does treatment need to be re-applied regularly?
I live in bushland so would removing the plants altogether be the best solution?
Thank you for any help you can give.

Submitted: 10:37AM, 17 Jul 2017
Answer: Hi there,

Thank you for contacting Yates.

The dots on the foliage of your Lillypilly hedge looks very similar to a fungal leaf spot disease. We would recommend using Yates Leaf Curl Copper Fungicide Spray to control them. You can see a picture of the product using the below link.
http://www.yates.com.au/images/au/products/disease-control/yates-leaf-curl-copper-fungicide-spray.jpg

To improve their health you can apply Dynamic Lifter Soil Improver & Plant Fertiliser every six to eight months. If you continue to see a spread of the problem even after 3 applicaitons do notify us and we can investigate further for you.

Hope this information is helpful, if you have further queries do let us know.

Kind regards,

Eric
Yates Horticulturalist

Answered: 11:50AM, 17 Jul 2017

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