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Phalaenopsis diagnosis please

This is a discussion on Phalaenopsis diagnosis please within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; This same symptom has been developing on the newest leaves of many of my mature ...

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  1. #1
    Delila is offline Member
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    Question Phalaenopsis diagnosis please

    This same symptom has been developing on the newest leaves of many of my mature Phals. Gradually more and more are showing these splotchy markings, usually beginning in the central vein.

    What is the likely cause?









    Thanks

  2. #2
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    Not sure what this is. Hopefully someone else will reply. Do the leaves stay wet often? I see you keep them outside. Could it be sunburn?

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    I had some mealybugs come in with some paphs. They really like the phals which results in a similar damage. I can see some white stuff on the leaves which could be the mealy bugs. Look deep in the base of each leaf. If you see white it is mealy bugs. I hate them.

    A few of the areas look more like mechanical damage.

  4. #4
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    What does the underside of the leaves look like. Mealy's hide there too.

  5. #5
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    No, the leaves don't stay wet. I don't see any mealybugs.

    Also, it's only the newest leaf in each case. I'm wondering if it might be a virus

  6. #6
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    I'm looking at the angle of the newest leaves as apposed to the rest of them. They seem to be twisted. Did you recently turn them around? Maybe put them in a different position after you finished watering? Has anyone used an herbicide in the area recently?
    Last edited by Chris in Hamilton; June 17th, 2016 at 05:37 PM. Reason: feeble but curious mind

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    No, no, and no .

    It's strange because the exact symptom has developed on more and more different Phals in different locations. So far it's only the larger, mature ones. None of my seedlings are affected.

  8. #8
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    Quote Originally Posted by Delila View Post
    No, no, and no .

    It's strange because the exact symptom has developed on more and more different Phals in different locations. So far it's only the larger, mature ones. None of my seedlings are affected.
    Weird. You're plants look really healthy except for marks and twisting new growth. The only other thing that I can think of might be an accidental fertilizer overdose. Hope someone who specializes in Phal.'s stops in.

  9. #9
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    I don't know myself. I've some similar symptoms, not necessarily new leaves or old plants, but the twisting and damage looks like what was the result of scale damage on my Phals, so check the underside of the leaves for scale. Perhaps try using a systemic insecticide in case it is insect damage? I'm pretty much just guessing though.

  10. #10
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    Looking at the first two pictures, it could be Leaf Spot fungus or Bacterial brown spot. I have a few books on orchids and Ortho's Complete Guide to Orchids pg 88 & 89 comes close to what I see here. They recommend spraying with a bactericide or a fungicide.

    I doubt that scales and or mealybugs are the problem, so my best guess is that it's either a virus or a fungus. JMO

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