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URGENT HELP! Black spot on pb of my Odm. Margerate Holm

This is a discussion on URGENT HELP! Black spot on pb of my Odm. Margerate Holm within the General Orchid Culture forums, part of the Orchid Culture category; Gang, I'm in the midst of repotting this plant - didn't repot it when I ...

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  1. #1
    JOHNnDC's Avatar
    JOHNnDC is offline Senior Member
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    Default URGENT HELP! Black spot on pb of my Odm. Margerate Holm

    Gang, I'm in the midst of repotting this plant - didn't repot it when I got it this past February, my bad - and one of the PBs has a spot of rot on it - towards the base of the PB, probably the size of a dime - black spot, mushy, etc. The rest of the PB appears fine. The plant has 3 mature PBs that have already bloomed, and 4 new PBs that started growing in February or so. It's one of the old PBs that's got the rot.

    Do I excise the bad part of the PB and try to save it? If so, how? Do I just cut the damn PB off? In the midst of repotting now, so any quick answers would be welcome! Thanks,

    JOHN

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    Heather is offline Banned
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    Default Sorry John I am no help on this one...

    John, I apologize but I don't grow any of these, so I have no clue but Lja is around and maybe can help?

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    Thanks Heather - I'm not sure if this one needs a species' specific answer or whether it's more of a general question of what you do when you find rot on a fat pseudobulb - cut it out or throw it out?

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    To try to save it i,d sterlise a sharp knife & then remove the effected area a bit at a time until i got to good plant & then treat the wound with a bit of powdered cinammon.Personally i,d remove it as you seem to have enough PB,s so that it shouldn,t effect blooming.

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    John, if it were me, I would just go ahead and remove the entire pseudobulb, like uncasteeb said, with a sterilized sharp knife or single edged razor blade. Then either dust the wound with cinammon or put a dab of pruning sealer on any cut areas.

    I've tried just cutting away PB rot before, down to healthy flesh, and while it works, you end up with a scarred / defective looking plant.

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    John, if it were me, and no one who really knew the answer actually answered my post, I'd remove the bad pb. You've still got two healthy old ones and healthy new growth. I don't imagine you can successfully remove just part of the pb. I seem to recall reading a similar question somewhere within the last week or so and the suggestion was to remove the bad pb.
    Good luck,
    Liz

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    Well, I guess you can remove just the bad part of the pb I should have waited for someone who really knows to answer.

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    You folks rock, thank you. I'll remove it then. I was worried about the old "not enough pseudobulbs" issue, but as someone noted, I do have 4 more new ones that are growing quite well, and 2 other healthy mature ones, so hopefully that will work.

    Thanks everyone.

    JOHN

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    Quote Originally Posted by Liz
    Well, I guess you can remove just the bad part of the pb I should have waited for someone who really knows to answer.
    lol liz, don't beat yourself up. You tried to help and that's what counts

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    Well, and actually Liz, your advice concurrred with everyone else's - namely, to remove the bulb!

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