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  • 2 Post By Halloamey
  • 1 Post By zainal abidin

Leaf rot? Fungus? Help!!

This is a discussion on Leaf rot? Fungus? Help!! within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Hi all! I bought an orchid for my dad at my favorite clearance warehouse a ...

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  1. #1
    OrchidAddict's Avatar
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    Unhappy Leaf rot? Fungus? Help!!

    Hi all! I bought an orchid for my dad at my favorite clearance warehouse a few days ago. Last night I went to repot it, and when I took it out of the bag and took the fancy "wrapping paper" off the pot, I discovered this crap all over the leaves!!

    Name:  leaf rot 2.jpg
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    At first I thought it was rot, but it's not squishy at all...the leaves are completely firm, even where the brown patches are. The brown spots seem to have a "halo" of yellow around them, and they go all the way through the leaves. Here's a shot where you can see the back of one of the leaves.

    Name:  leaf rot.jpg
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    I've never dealt with anything like this before. I have the orchid in quarantine right now, just in case whatever this is could be contagious. I don't want any of my other orchids catching it.

    The flowers and buds still look quite healthy (buds are still opening), and there are a few leaves on the plant that seem unaffected by whatever this is.

    What do I do with this plant? Can this be treated? Should I chuck it?

    I hesitate to give it to my dad at this point, even though he's fallen in love with a clone (or sib) of it that I have. He drools over it every time he comes over, so I told him if I happened to see another one I'd get it. But this was a $6 plant, and this clearance warehouse gets shipments in frequently...it's likely that another will show up that's healthy. As much as I like to rescue plants, I'm leaning toward throwing this one away. Looking at the leaves gives me the creeps. But if there's an easy solution, please tell me and I'll try to fix up the plant!

    What are your thoughts?

    Thanks as always!

  2. #2
    Halloamey's Avatar
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    What you see here is necrosis of the leaf tissue, it can be caused by many different reasons, even though it is firm now, it can easily get infected with bacteria and fungii. I would make sure that the foliage remains dry and give it a good dusting of sulphur at the affected spots.

  3. #3
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    Thanks Amey!! Well, I guess the good news is that necrosis isn't contagious. Should I attempt to remove the leaves that look the worst, or would that just open the door for infection?

    Poor plant!

  4. #4
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    Leave it on for now and see how it progresses after you have applied the sulphur, if it dries and becomes crisp in a a week or so, leave it as it is, but if the black spots keep growing in size, I would remove the affected leaves.

  5. #5
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    Thanks Amey!

    Update: Well, someone in another forum told me to MAKE NO MISTAKE....this plant has a SERIOUS PROBLEM, and it must be dealt with swiftly before my entire collection turns into a bunch of rotten schlock. I decided to err on the side of caution, so I removed the damaged areas last night. Actually, the plant looks quite a bit better now. Miraculously, there were only a couple of leaves that were badly affected, so I had to remove 80% of one leaf and about 20% of two others, and then everything else looked fine. It has quite a few full, healthy leaves left, and due to the fact that the "surgeries" went neatly and cleanly, it still looks presentable and I think it could still make a nice gift for my dad. I'll wait until the wounds heal up completely and pass it on to its new happy home.

    I've done partial leaf removals before, and I've always had great success, so I am optimistic that this plant will keep on going like nothing even happened. Thanks as always for your help!!


    I'll try to remember to take a pic of it post-surgery so you can see how much better it looks!

  6. #6
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    Hi Jenn, I believe my phals. (2) had the same problem, I think it was a bacteria, I used Phyton 27 and it seemed to clear it up.
    I left my leaves on and it hasn't spread, I hope you have the same success as I have, waiting for storm on Jersey shore.

  7. #7
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    Quote Originally Posted by hank3443 View Post
    Hi Jenn, I believe my phals. (2) had the same problem, I think it was a bacteria, I used Phyton 27 and it seemed to clear it up.
    I left my leaves on and it hasn't spread, I hope you have the same success as I have
    Oh, really? I didn't think Physan would do the trick with something like that...the person who said I needed to remove the leaves pointed to the yellow "halo" around the brown stuff as a sign that the infection was spreading, and it was an internal problem, not a surface problem. So I didn't think applying anything to the surface would fix the problem.

    Anyway, glad Physan worked for you! My plant seems happy now that the damaged areas have been removed.

    Waiting for storm on Jersey shore.
    Ack...be safe!! It's hitting us right now. I'm hoping the hurricane that is currently trying to blow our house down doesn't impact any of my orchids...they're all inside, but it's not like they're getting any sun...or will be, for that matter...I have moved my entire collection under grow lights for the duration of the storm....let's just hope the power stays on.

  8. #8
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    Well done Jenn I will do the same thing cut and remove the affected side, no harm and no need to worry just to observe any new changes to the normal leaves.

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