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Potinara: Leaves turn Light Brown in Sun

This is a discussion on Potinara: Leaves turn Light Brown in Sun within the New Growers: Ask the Senior Members forums, part of the New Growers category; Hi, my Potinara Hwa Yuan Gold YK #2 was in my room since I got ...

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    Default Potinara: Leaves turn Light Brown in Sun

    Hi, my Potinara Hwa Yuan Gold YK #2 was in my room since I got it. Three days ago, I placed it on our roof terrace. Today i see on large areas that the leaves turned light brown. Is that a sign of too intensive sun or a too short time to get used for that sun intensity? In my room I reached 500 candle foot, on the terrace it is 3,000 candle foot.

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    Sven a photo would help,but from what you have said.It sounds like sunburn.The transition from inside to direct sun should be done gradually.Please post a photo when you can,so we can see for sure. Take Care,Rich

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    I agree...it sure sounds to be so...just like we can't go the beach and spend the day with out getting burned.

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    Yes, sounds like sunburn. I agree as well.

    Cheers,
    BD

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    Here's the photo. The two leaves at the right show each one large sand-colored spot, the leaf at the left shows a dark brown area which still grows slowly from the tip towards the stem.

    As described above, the orchid came some days ago from a room with around 500 candle foot of light to our roof terrace where there are around 3,000 candle foot units of light. Also, it rained several times, while in between it was again very warm and sunny (I live in Jamaica).

    As a first counter-measurement, I put the Potinara back into the room, two days ago. However, the black (dark brown) darkening continues and has reached meanwhile the upper end of the "yellow spot line" on that leaf.
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    Yep looks like sunburn to me....

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    And the black area which is still growing?

    Also, will these sunburns gradually disappear? Or influence the plant is some way?

    Will that dark area continue to grow? What's causing it? ow to stop it?

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    in my experience, those plants that are badly damaged by sunburn gets infected with
    fungus quite easily. so that growing black spot may be fungus... in any case i would
    apply fungicide. the plant is'nt that badly burned so expect for it to bounce back. But
    you have to live with those burned leaves as they aren't going away until the leaves drops.
    I wouldnt cut it since it still has some nice green in there.

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    Thanks! I have fungicide, and will spray it in weak concentrations several times on that leaf. Or what's the best way to apply fungicide to a Potinara?

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    I applied a fungicide, but the blackness still continues to expand. Help required. Urgently.

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