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Anyone know what this is? Brown on Paph leaves.

This is a discussion on Anyone know what this is? Brown on Paph leaves. within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; this is not wet, there is no odor, no powder. It feels just like the ...

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  1. #1
    Forrest is offline Senior Member
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    Default Anyone know what this is? Brown on Paph leaves.

    this is not wet, there is no odor, no powder. It feels just like the normal part of the leaf.

    What do you think?
    Attached Images Attached Images    

  2. #2
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    LJA
    LJA is offline OrchidTalk Tech Admin
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    If it doesn't smell "spicy" it's probably not Erwinia, but it might be some type of Pseudomonas, given the blistery look in your second pic.

    I'd definitely cut off any affected leaves or portions of leaves and spray with either Physan or some other kind of disease control that targets bacterial as well as fungal infections. Don't let it keep going like it is--it looks like a pretty bad case and might kill your plant.

  3. #3
    Gilda is offline "Master of the Moth and Phrags "
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    Forrest,
    I don't know what that is called but I have had that hit 2 of mine last year, and it is a booger to get rid of. I tried cutting back past the brown....didn't work, kept spreading. Tried Physan...didn't work. What I found that worked was a systemic fungicide....with held water and only used this ...on leaves,down in the fans..all over !! Continue to use till you see the brown turning dry and crispy. A maudiea type paph and a bessea phrag were the patients. They are recovering, but it almost did them in. Good Luck !

  4. #4
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    Gilda, do you remember what brand of fungicide you used?

  5. #5
    Gilda is offline "Master of the Moth and Phrags "
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    Ortho's Rose Pride(formerly known as Funginex). Mix as for roses. Good stuff to have on hand for serious crud.

  6. #6
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    pseudomonas should smell as well, although not the nasty odor as in erwinia, but more like a fruity odor. It has been described as grape-like.

    I don't know what that stuff is, but since it is affecting new growth, it needs to be dealt with promptly. That bottom leaf looks like it needs to come off at the base, while the top one looks like it needs to be cut an inch into healthy tissue. Since I'm a windowsill grower, my hands are tied when it comes to pesticides and the like, so I'd just dust with cinnamon/sulfur and see if it comes back. But if you have a garage or GH, by all means blast away with the big guns...

  7. #7
    espranch is offline Senior Member
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    Gilda, Thank you for sharing that info with us! Betty

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