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Going Brown from the Bottom up

Discussion in 'Issues, Disease and Pests' started by devilx, Sep 15, 2009.

  1. Sep 15, 2009 #1
    devilx

    devilx Catt-lover

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    Hi Guys

    I would appreciate if you could help me alittle. I have had several catt hybrids and species dying on me in an unusual manner. They are doing well for a few months and suddenly they start to go brown and dry from the bottom up. I have tried to cut off the affected parts so that it will not spread to the rest of the plant but to no avail. There was no way that the plant could have send out new eyes to save itself. Any ideas? TIA!

    Cheers
    Sean
     
  2. Sep 15, 2009 #2
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I don't know the answer, but have a few questions that would give us more information. Are these plants that you have grown for a long time or are they recent acquisitions? Are they from the same source? If you cut the rhizome between a healthy pseudobulb and a bad one, is the inside of the rhizome white or is part of it brown or streaked? Are you using a sterile razor blade or a disinfected knife when you cut the plant?
     
  3. Sep 16, 2009 #3
    devilx

    devilx Catt-lover

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    Hi Marni

    These plants were new acquisitions and came from 2 sources. After I cut the rhizome with a sterile blade between a healthy and bad peudobulb, the inside is white. I then use cinnamon powder to cover the part that was cut. However it still goes brown after a few days.

    Cheers
    Sean
     
  4. Sep 16, 2009 #4
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Hopefully someone else here will have some suggestions. Good luck.
     
  5. Sep 17, 2009 #5
    Mary Jane

    Mary Jane New Member

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    I don't know, Sean, but I would definitely put them in isolation until you figure it out. Don't want *it* spreading to your other plants!
     
  6. Sep 18, 2009 #6
    devilx

    devilx Catt-lover

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    Hi MJ

    I have put the one that is still alive in a different place to prevent spreading whatever it is to the rest. As of checking today, another peudobulb is starting to go brown from the bottom again. Got this one off ebay from Royal Orchid Club.

    Cheers
    Sean
     
  7. Sep 18, 2009 #7
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I hope you have talked to them.You said you got these plants from 2 sources. Some vendors here are brokers and are selling plants they get from outside sources. It may be that both sources have plants from the same supplier.
     
  8. Sep 19, 2009 #8
    This_guy_Bri

    This_guy_Bri weirdo

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    any way you could post a photo?
     
  9. Sep 21, 2009 #9
    bromheadia

    bromheadia New Member

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    Sounds like it is a fungal infection. If the lesion is moist-wet, it is likely to be caused by phytophthora or pythium, but, if it is dry, likely culprit is fusarium. Stale, acidic or wet medium may be the cause of this fungal problem. If the infection is caused by fusarium, it is better to discard the plant as it is almost impossible to rid a plant of this fungus.
     
  10. Sep 25, 2009 #10
    devilx

    devilx Catt-lover

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    Hi Guys

    I have attached a couple of pics which I hope can help in the diagnosis. TIA!

    Cheers
    Sean
    sean 121.jpg sean 124.jpg