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Cattleya Black Spots - Treatment Advice Needed

This is a discussion on Cattleya Black Spots - Treatment Advice Needed within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Hello, I am a relatively new to the orchid community. I have an ailing orchid ...

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  1. #1
    Jfc725 is offline Junior Member
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    Default Cattleya Black Spots - Treatment Advice Needed

    Hello,

    I am a relatively new to the orchid community. I have an ailing orchid and I could use some advice. I have had this cattleya orchid for a year and a half. It started out green and thick and now it has become withered and spotted. Any advice how to treat would be appreciated. Specifically, what went wrong, how should I treat and what should I expect moving forward?
    Here is some history.

    1. Plant had full west light for first 6 months with open shade. I live in NJ.
    2. I watered once a week by running under sink and let drain.
    3. Changed medium a year into having plant
    4. Apartment environment is Central air (76 degrees spring/summer) and heat (78 degrees).
    5. Plant was alone for first 3 months. Then added citrus plants for the winter and fought scale on those plants. This spring added more orchids and bromeliads to collection.
    6. Pulled down shade and opened 50% to limit the sunlight for the past 4-5 months.

    Thanks.
    JFC
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  2. #2
    catttan's Avatar
    catttan is offline Senior Member
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    Check for red spider mites on the underside of the leaves. I hate to be an alarmist but I would not rule out virus.

  3. #3
    Jfc725 is offline Junior Member
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    Quote Originally Posted by catttan View Post
    Check for red spider mites on the underside of the leaves. I hate to be an alarmist but I would not rule out virus.
    Posted via Mobile Device

    ---------- Post added at 06:44 AM ---------- Previous post was at 06:41 AM ----------

    Quote Originally Posted by Jfc725 View Post
    Posted via Mobile Device
    I check the plant often and I have never seen mites. I have used Bayer natura insecticidal soap spray once or twice. Thanks for the feedback and appreciate any additional thoughts.
    Posted via Mobile Device

  4. #4
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    tucker85 is offline Senior Member
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    Is it just that one leaf? It may be that the one leaf is dying. That sometimes happens. I don't think it needs to be treated with anything. The orchid looks a little dehydrated. Cattleyas do prefer to dry out between waterings but when you do water it, take it to a sink and water really well. Maybe do that a little more often than you have been but still let the media dry between. Large cattleyas require a lot of light also. I see your phalaenopsis is closer to the light than the cattleya. Catts need more light than a phalaenopsis. Good luck.

  5. #5
    Ryan Young is offline Junior Member
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    It looks to be bacterial from what i can see, plants under stress are susceptible to infections easier, from the appearance of leaves looks like it has been dried out a few times, either due to low humidity or low water intake, (lack of roots / infrequent watering) increase air movement to keep bacteria at bay, and up your watering routine like tucker said.
    Posted via Mobile Device

  6. #6
    Jfc725 is offline Junior Member
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    All my leaves look like they have seen better days. I moved the cattleya back from the light because i thought j mkght be burning the leaves. If it is bacterial then is air movement the only solution ? Also are the black areas that have taken over the leaves permanent? While I don't expect the leaves to be plush and plump again how will I know if the plant is getting better?
    Posted via Mobile Device

    Thanks. All the leaves look the same. Is the black stuff permanent? Is air movement the only solution to bacteria? Will the black stuff decrease as the plant gets better? Appreciate all the help and support.
    Posted via Mobile Device

  7. #7
    Puppies2 is offline Member
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    Having been born and raised in NJ for the first 20 years of my life, the state does not have enough humidity for the catt or phal. Unless you live in the Jersey shore area. Do you have a humidifier? That would help with the dehydration problem as well as watering more often. As others have said, good air movement is essential. Good luck

  8. #8
    Jfc725 is offline Junior Member
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    Thanks all for the responses. Keeping my fingers crossed.
    Posted via Mobile Device

  9. #9
    Desdinova is offline Senior Member
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    If you live in a dry area, I suggest repotting in sphagnum moss, so you don't have to water every day. It will take a little time to adjust to it. But it helps a lot. I grow almost everything in it, including my walkerianas.

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