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  • 1 Post By Magnus A
  • 1 Post By OrchidAddict
  • 1 Post By jhodgson
  • 2 Post By Brutal_Dreamer

virus or cold damage in Cattleya

This is a discussion on virus or cold damage in Cattleya within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I just opened a package from Hawaii that took almost a week to get here. ...

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  1. #1
    wfuavenger is offline Junior Member
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    Default virus or cold damage in Cattleya

    I just opened a package from Hawaii that took almost a week to get here. I live in nc and the night time temps the last few days have been in the upper 30's and very low 50's during the day.

    my suppliers supply of test strips is out and I am concerned about this plant. There are two leaves (one is newer looking but not the newest growth) that are like this and some mild chlorophyll variation

    Is this a virus or damage from the cold? it barely goes through on one of them and not at all on the other streak.


  2. #2
    Magnus A's Avatar
    Magnus A is offline Senior Member
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    Hard to say. I would wait and see.
    If it stays like this and does not appear on new growth you do not need to be conserned.
    /M

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    Looks like cold to me, wait and see. I had similar damage on one of my plants when I failed to move the leaves away from the windowpane and it went down in the -30 area in the night.

    Good luck!

    Laura

  4. #4
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    Default

    I agree the others...it doesn't look like anything contagious...it looks more like physical trauma to me, especially since it is concentrated around the outer edges of the leaves. In my limited experience, contagious things like viruses and bacteria tend to cause brown or black splotches that are sometimes mushy...but yours looks yellow and, well, "crispy," so to me that says physical damage from the cold. Just tend it with care, because plants that have damaged tissue are more susceptible to infection, so while it might not be anything contagious now, it could turn into something yucky if not treated well.

    Did you give the plant a good soak upon arrival? Dehydration could also be playing a part here, I think.

    At any rate, definitely keep an eye on it, and if it starts to turn brown or look yucky, I'd remove the damaged leaves. But if it just stays like this and the new growth is coming in ok, I wouldn't worry too much about it.

    Good luck...hope it recovers well!

  5. #5
    jhodgson is offline Member
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    I have a Laelia purpurata with a smaller spot just like yours along one of the leaf edges. It never bothered me in the past and newer growth has not shown this condition. I just went out and felt the leaf and the area is hard. If your plants condition is similar, I would not worry about it.

  6. #6
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    Brutal_Dreamer is offline Dreaming with my eyes open...
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    Looks like cell collapse from cold damage or perhaps some sort of sucking insect. I don't think it is virus from your photo.

    cheers,
    BD

  7. #7
    wfuavenger is offline Junior Member
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    I have tested it and it is negative for CymMV and for orsv. It must be cold damage like everyone says! Thanks guys!

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    I am new to orchids but just built a greenhouse to house about 100 cattleyas that was given to me by a grower. (All needed to be repotted etc...) I am interested in this test you are talking about. I didn't know there was such a thing. What types of tests are available!
    Cheers!

  9. #9
    wfuavenger is offline Junior Member
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    I used test strips for the viruses produced by Agdia out of Elkhart, IN. I also have used them by sending them samples suspected of being infected. They test them in the lab.

    This orchid has sent out 4 new shoots and all are healthy looking.
    Posted via Mobile Device

  10. #10
    sandbag3 is offline Junior Member
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    Thumbs up

    Quote Originally Posted by wfuavenger View Post
    I used test strips for the viruses produced by Agdia out of Elkhart, IN. I also have used them by sending them samples suspected of being infected. They test them in the lab.

    This orchid has sent out 4 new shoots and all are healthy looking.
    Posted via Mobile Device
    Good to hear! Went to that site $8 per strip for the strip test for the most likely viri in orchids.Good information.Thanks!

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