Is this myrtle rust or something else?

[gnichols]

I managed to do an aerial layer and it has been successful so far, new shoots popping out. But before I get too excited what is this on a few of the leaves. Looks like an orange stain and what looks to be white spores on the underside of some leaves. Also attached is a photo of the original tree, for ID purposes.

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[Rory]

Your pics are very blurry.

Normal rust is one thing, but myrtle rust is a whole new ball game.
Generally, myrtle rust is noticeable because the new growth eventually becomes quite affected and sickly, depending on the severity of the infestation.

Myrtle rust (if one has it), will go gangbusters after a period of cloud, rain, lack of sun etc. Humidity, dampness, warmish and crowded conditions are a haven for the disease.

The yellow spores (wattle-looking) appear quite a while after it has taken hold, and form like a coating all over the affected area.
It is at this point that when you bump them, they disperse into a cloud of hell, that floats over into the rest of your garden.

At this point, your photo doesn't look like myrtle rust to me, but in future its best to get sharp photos for identification.
It is very hard to identify the very initial stages of myrtle rust, but because it is now endemic just about everywhere in NSW, its more an issue of treatment and management, rather than trying to eradicate it from your garden.

If you are worried, I would post another photo in a weeks time for us to look at, showing the areas with a clear photo, and no blurring.

Example of Myrtle rust:

https://www.ausbonsai.com.au/forum/view ... 36&t=26383

[Yakos]

This is not Myrtle Rust. See this link:
https://www.dpi.nsw.gov.au/biosecurity/ ... yrtle-rust

[gnichols]

Your pics are very blurry.

Normal rust is one thing, but myrtle rust is a whole new ball game.
Generally, myrtle rust is noticeable because the new growth eventually becomes quite affected and sickly, depending on the severity of the infestation.

Myrtle rust (if one has it), will go gangbusters after a period of cloud, rain, lack of sun etc. Humidity, dampness, warmish and crowded conditions are a haven for the disease.

The yellow spores (wattle-looking) appear quite a while after it has taken hold, and form like a coating all over the affected area.
It is at this point that when you bump them, they disperse into a cloud of hell, that floats over into the rest of your garden.

At this point, your photo doesn't look like myrtle rust to me, but in future its best to get sharp photos for identification.
It is very hard to identify the very initial stages of myrtle rust, but because it is now endemic just about everywhere in NSW, its more an issue of treatment and management, rather than trying to eradicate it from your garden.

If you are worried, I would post another photo in a weeks time for us to look at, showing the areas with a clear photo, and no blurring.

Example of Myrtle rust:

https://www.ausbonsai.com.au/forum/view ... 36&t=26383

Next time I promise to not use the potato for photos

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[Rory]

This is not Myrtle Rust. See this link:
https://www.dpi.nsw.gov.au/biosecurity/ ... yrtle-rust

So you are aware, the pics on that website are when the disease is more advanced and easily identifiable.

Myrtle rust does not look like those pics when it first appears. That is many days, if not more than a week before it may start to look like that if the disease has got hold.

[Mitch_28]

I managed to do an aerial layer and it has been successful so far, new shoots popping out. But before I get too excited what is this on a few of the leaves. Looks like an orange stain and what looks to be white spores on the underside of some leaves. Also attached is a photo of the original tree, for ID purposes.

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Looking doing one myself. How thick was your material and how long ago did you do it?

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[gnichols]

I'd say the bark was about 3 or 4 cm across. I started it December 2018. I put two on at the same time, the other one isn't quite ready. But this one seems to be feeling more secure in the pot after only a few weeks.

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