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Soft Brown Leaves?

This is a discussion on Soft Brown Leaves? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I know it's natural for orchids to shed older leaves, but any time they've ever ...

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  1. #1
    TwoStems's Avatar
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    Default Soft Brown Leaves?

    I know it's natural for orchids to shed older leaves, but any time they've ever done it on my plants the leaf turns yellow or brown and crunch and falls off. I've got a couple on the same tray (1 paph, 1 zygo) That have brown soft leaves that don't just come off when tugged. Should I be alarmed? The zygo had some damage from a time I knocked it over - one of the leaves snapped and it's got some bruising but it seems fine otherwise. The brown leaf is at the center of a newer growth that produced a spike last cycle
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    This leave is on the oldest growth so I wasn't concerned until I touched it and it wasn't crunchy.
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    Can I just cut these off? Leave them be? I'm all for a plant doing its thing and I don't usually cut back dead growth just because it's unsightly.

  2. #2
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    The first is definitely bacterial rot ! Bring out the big guns !!

  3. #3
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    Crap! How did that happen??? How can I treat it? Should I keep it away from the rest of my plants? I wonder if both are suffering the same thing since they sit on the same tray.
    It actually has a new growth coming in that looks super healthy

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    Definitely remove the bad leaves, before this spreads. I've had good luck stopping a rot before it spreads, but I think mine were fungal, not bacterial...I think that after cutting the affected part the treatment is different. So, as for treatment, you might find this article useful: http://www.aosforum.org/pdf/Batchelor_15.pdf

  5. #5
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    Thanks Kathi, that was very helpful! It sounds like it is indeed bacterial brown rot. And the plants affected make sense for this kind of rot. I'll take care of it right away!

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    Any suggestions for removing all of the affected plant matter in the first plant? I cut it back as far as I can get, but it's in the center of the growth so there's some I can't reach with a blade. Should I remove the whole growth?

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    Where ever there is soft brown/black rot, it MUST be removed with ( I use a sterile knife )I cut down to healthy green tissue; then spray with alcohol, then put sulphur powder on the cut. The sulphur kills any bacteria. This method has always worked for me...Betty

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    If you cannot reach in the centre give it a good dusting with sulphur powder as Betty suggested, it will suck in the moisture and dry out the wound and the infection. Not to mention, do not get the foliage wet now.

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    yikes......sure doesn't looks good especially for the one in the first pic where it is attacking at the center. i usually removed as what had been mentioned in the replies and treat with sulphur/antifungal powder to dessicate the area out.
    but just to share this one, knifes have a sharp pointed end, i find it not that easy at time to removed damage area. this is what i do, i take a large gauge wire, cut it into 4 inches long, sharpen one of the end into a 'v' shape structure. it acts like a micro chisel that is really sharp. the thing i like about this is it is razor sharp, fine and can reach into great depths.
    another alternative is to get a hobby carving set, it has something like a micro chisel as well with it but it is costly.

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    Hoping the new new shoot will come out once the infection go off.

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