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Too cold, too wet??

Discussion in 'Issues, Disease and Pests' started by weeand, Jan 3, 2021.

  1. weeand

    weeand Well-Known Member

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    My question what happened here.
    Within 14 days you can see puddles and spots appear on the leaves. Masdevallia scabrilinguis dropped almost all the leaves. At my Masdevallia filaria you can see puddles and spots. At Lepanthes dodsonii, spots appear and then the leaves shrivel. All circumstances haven't changed, it just got cooler. I water at five o'clock. There is a lot of air movement. Almost all leaves move more or less. LF is 75% to 95%. Temperature 12.5°C to 19.5°C
    I know these plants all grow between 1500m and 2100m. That would be temperate temps.
    Can the cause be too cold and probably wet leaves? Or could there be other causes.

    filaria.jpg scabrilinguis.jpg dodsonii.jpg
     
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  2. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    André, On the 2nd image, I can see damage for what I think would be false spider mite. Those are different than spider mite. But that doesn't do the damage showing on the other 2 plants. The temperatrue shouldn't be too low for M filaria. Mine go to 10C regularly. Are you watering at 5 am or 5 pm? If you are watering in the evening, there might be too much water on the plants at night. Hopefully others will be better able to diagnose.
     
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  3. Chuck-NH

    Chuck-NH Well-Known Member

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    I sometimes have similar issues if it is wet, cold and during the long nights of Winter...maybe cold is not the primary factor? I also agree with Marni that something else might be going on with the filaria.
     
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  4. weeand

    weeand Well-Known Member

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    Marni, thank you very much for your repley!
    The second photo is from M. scabriliguis. I had some problems with false spider mite this summer, but I tackled that problem.
    I water my plants at 5 pm. And I think that this is the problem that causes these problems.
    I am going to water them every other day and in the morning (about 9 or 10 am)
    My misting device will be on at 4 pm for about 4 hours. To krank up the RH befor the night without wetting the leaves.
    I hop that will do the trick butr I am afraid it will be to late both the Masdevallia's. :(
     
  5. weeand

    weeand Well-Known Member

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    Thanks Chuck for the reply.
    Glad to hear I am not the only one with this sort of problems, in the sense of "shared sorrow is half sorrow" :)
     
  6. KellyW

    KellyW Orchid wonk Staff Member Supporting Member

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    On photos 1 and 3, I have had similar looking issues caused by condensation drip.
     
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  7. weeand

    weeand Well-Known Member

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    Thanks Kelly! Never thought about condensation drip
     
  8. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I have periodic outbreaks of the false spider mite and they never really seem to go away completely. They thrive in high humidity and cool temperatures. By the time you see the damage on the leaves, they have left those leaves and are attacking the new ones.

    And speaking of shared sorrow, I have been having major problems from several sources for the last 3 years. You aren't alone and there is always another one around the corner.
     
  9. weeand

    weeand Well-Known Member

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    Thanks Marni, I will take out my magnifying glass again and will do an inspection.
    And thanks for your encouragement. Sometimes I find it very frustrating and don't have that much patient at that moment. (flaw in my character :) )
    But when I see one flowering again, like the Masdevallia constricta, it's a joy, big smile on my face. :))