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Vanda flower problem - petal deformation

This is a discussion on Vanda flower problem - petal deformation within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have a problem with several vandas which are all in flower at the present ...

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  1. #1
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
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    Geoff Hands
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    Default Vanda flower problem - petal deformation

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    I have a problem with several vandas which are all in flower at the present time. One of the two petals is deformed - or maybe it is just not in quite the correct position - being twisted out of the proper place. This one plant ( Vanda coerulea alba x Bangkok Sunrise) serves to illustrate this. As you can see there are two spikes, making a total of something like a dozen flowers, so the plant is generally growing quite well. On one pic I have added the letters S and P. I am talking about the petals marked P - and you can easily see what I am talking about. A flower on the other spike, in the bottom right hand corner is similarly deformed. I will come back to the dorsal sepal marked S later - but for now, I have never seen this petal deformation before , I have it on several plants all in flower at the current time, and all have previously flowered with perfect flowers.
    So why ? Damage from a spray ? I have been using new things ( recomeded for orchids, but not used by me before ) to try and control the last remants of the scale problem which bothered me last year . Or some kind of temperature damage ? Some event surely - which happened at the time all the buds concerned were at a particular stage of development ? Any thoughts orr comments anyone ?
    I will just deal with that fluted top or dorsal sepal marked P - this particulatr Vanda is inclined to do this ( none of the others do) if not grown really well. I think this plant must have been fairly well grown this year to give two spikes and a dozen or so flowers, many of which are perfect in all respects , so I leave this out of the question.
    Another of the plants behaving in exactly the same way - deformed petals on one only of the two petals, , btw, is Ascda Oriental Siberian - posted in the Vandas in flower forum later today, although there I have taken care to choose a viewpoint which avoids the flaw being clearly seen.
    Last edited by Dorsetman; May 21st, 2012 at 02:29 AM. Reason: images problem.

  2. #2
    Cjcorner's Avatar
    Cjcorner is offline Senior Member
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    Connie
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    Hmm...interesting. I get that, but on my cattleya types. I usually ascribe it to bugs or genetic mutation. It is my understanding fluctuations in temps can cause this, or stress. I think some have genetic problems that are mistakenly thought to be virus.

  3. #3
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is online now Dreaming with my eyes open...
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    I posted about this in your other thread with the beautiful Ascocdenda orchid. I thought maybe a chemical or fertilizer reaction since it is in more than one plant. Also, I thought maybe something to do with the ph of the water? All just guesses, really. Amey might have a much more reliable scientific explanation if he sees this thread.

    cheers,
    BD

  4. #4
    catttan's Avatar
    catttan is offline Senior Member
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    Like Connie, I've had this happen to my cattelyas, usually during a prolonged hot spell but they returned to normal once the hot spell is over.

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