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  • 4 Post By raybark
  • 1 Post By raybark

Need immediate help!

This is a discussion on Need immediate help! within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Something is attacking my orchids one by one. The first one was a Zygo I ...

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  1. #1
    sand_tiger86's Avatar
    sand_tiger86 is offline Senior Member
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    Default Need immediate help!

    Something is attacking my orchids one by one. The first one was a Zygo I bought which eventually lost all of its leaves, but I thought nothing of it since I know that Zygos do tend to be somewhat deciduous. Whatever it is, it starts as black spots or just spots in general that get yellow rings around them and eventually the entire leaf goes yellow and dies. The leaves one by one do this. The first picture is a Phal that was under attack but I took the leaf off and I haven't seen the ailment return...yet. The second and third picture are of my Rossioglossum with the black spots I mentioned earlier. I know it's a matter of time before they spread and the entire plant yellows just like the Zygo.

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    Does anyone know what this could be? Bacertial? Virual? Pests? I haven't seen any pests but I really have no clue what to do to save my collection...

  2. #2
    raybark's Avatar
    raybark is offline Senior Member
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    Default

    I speculate you're dealing with a fungal attack, potentially weakening the plant to allow bacterial infections as well.

    Fungi thrive in warm, moist conditions, and are usually spread by water-borne spores. If your plants are in contact with each other, or you get any splashing between plants when watering, then that's the likely spreading vector.

    I would recommend a 3-pronged approach:
    1. Treat the plants with a systemic fungicide like Cleary's 3336WP (thiomyl)
    2. Spray your growing area with a topical disinfectant. I recommend Oxidate (AKA Biosafe Disease Control) for in-home applications.
    3. Improve your conditions to avoid the pathogen sharing vectors and increase air flow.

  3. #3
    clintdawley's Avatar
    clintdawley is offline Wrapped in metal..wrapped in ivy...
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    Default

    I'd do a peroxide spray and get a fan to oscillate on them.

  4. #4
    moniluhum is offline Senior Member
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    Should you treat all plants in the general vicinity? If using peroxide, is it full strength?

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    Here is what my ailment looks like.Name:  IMG_2760.jpg
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  5. #5
    ksriramkumar is offline Senior Member
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    certainly looks like fungal infection on the leaf. is it exposed to sun?. puzzled to see redness on the underside of the leaves. or is it magnesium deficiency?

  6. #6
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is offline Dreaming with my eyes open...
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    Make sure your plants leaves dry off completely after watering - do this with exceptional air movement across the foliage. This should reduce the chance of further issues once you have treated with fungicide as directed above.

    cheers,
    BD

  7. #7
    raybark's Avatar
    raybark is offline Senior Member
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    Forget the hydrogen peroxide. You're dealing with a systemic infection, and the peroxide is a topical treatment only.

  8. #8
    kspalding's Avatar
    kspalding is offline Senior Member
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    I would cut out the already affected areas before treating but thats just my opinion.

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