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what is this rusty coloured stuff ?

This is a discussion on what is this rusty coloured stuff ? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I found something that is concerning me on my new Colmanara Massai Red, I hadnt ...

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  1. #1
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    Default what is this rusty coloured stuff ?

    I found something that is concerning me on my new Colmanara Massai Red, I hadnt inspected it all that closely since I got it home and it was the only one the vendor had left and of course I had fallen for it so we got it, Does anyone have any idea what these spots are some of it wipes off and reminds me totally of rust but my main concern is mites it is on most of the leaves, there is no sign of webs what so ever and it leaves this little stain on the leaves I cant wipe off.
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    It looks like I have found out what this is and it not great news, It is Rust fungus and it can spread like wildfire in plants, it has been isolated well away from any other plant in the house both orchids and house plants and I have emailed the seller and will await a reply see if they can do anything for me. I will get a copper based fungicide tomorrow and treat it just keep your fingers crossed for me that I can treat it successfully as I really do love this plant.

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    When it comes to rust treatment you want to alternate between two different types of fungicide. I can't remember which two I remember having recommended in the past, it's been awhile, but will find out for you if you need me to.

    Shann~

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    That would be great Shann I really need to treat it and fast before it spreads. I was told a copper based fungicide so I guess its that and something else, any info is very much appreciated if you can get it for me.

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    The only rust I am familiar with is Daylily rust which is horrible stuff. Generally you need to cut off as much of the affected area as possible then spray treat. I don't know if your orchid has rust, or how it would respond to these treatments, but as soon as I can get ahold of my friend (who will have more info) I will let you know what she says.

    Shann~

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    Thanks Shann your a star, I cant cut much off as it has little patches of it on near enough every leaf and new growth forming so it would be tricky but I will try whatever is suggested. I so love this place your all so good to me.

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    I use a systemic fungicide called Thiomyl but I don't know if it is available out of US. Check with local garen Center to see what might be available.

    here is the sheet on it: http://www.southernag.com/PDF%20Files/Thiomyl.pdf

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    Thank you Ron that is great information I will see what I can get hold of tomorrow and try treat it quickly we dont want this spreading.

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    good luck Carrie

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    I was looking up more on the daylily rust and these 4 fungicide sprays were listed. They said to alternate between at least two of the four....but I don't know if what you have is the same strain of fungus.

    propaconizole (Banner Maxx)
    azoxystrobin (Heritage)
    flutolonil (Contrast)
    myclobutanil (Systhane)

    Always read the label on whatever fungicide you find and see if it lists plants like orchids as safe to spray on.

    Shann~

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