/ Register

Welcome to OrchidsForum.com. We are a friendly online community for Orchid Growers all over the world. If you haven't joined yet we invite you to register and join our community. Hope to see you on our forums!

Very sudden black spots on Stanhopea pseudobulb - pls help!

Discussion in 'Issues, Disease and Pests' started by Delilah, Nov 16, 2013.

Tags:
  1. Nov 16, 2013 #1
    Delilah

    Delilah Orchidaceous

    Messages:
    27
    Likes Received:
    5
    Location:
    Sydney, Australia = warm-temperate
    Hi

    I purchased a very lovely specimen of Stanhopea nigroviolacea 6 days ago from someone who lives near me (same climate). Just yesterday I re-basketed it very carefully, barely disturbing it, and watered it for the first time.

    Today I can see big black spots on the central pseudobulb and hints of the same on some others. What the?! I don't believe they were there yesterday, or I didn't notice them when handling it. What could it be that is setting in so fast, and why? More critically, what should I do, if anything?!

    ai732.photobucket.com_albums_ww325_finchesca_WP_20131116_0091_zps512c70d3.jpg

    I was so thrilled to get this particular plant and would hate to think that simply hanging it outdoors in a warm shady spot, doing a conservative re-pot and watering it once, would lead to disaster! Surely these plants are not so fragile?!

    Thanks for any help!
     
  2. Nov 16, 2013 #2
    Marni

    Marni Well-Known Member Staff Member Supporting Member

    Messages:
    13,770
    Likes Received:
    3,567
    Location:
    Santa Rosa, CA
    I don't know what causes that problem, but as far as I know, it doesn't happen overnight. I have seen it enough times on my plants to have asked quite a few people and mostly they don't have an answer. Some suggest it may be too much fertilizer or the wrong kind, but I think they are guessing too. I see you have active root growth so I wouldn't worry about that and I doubt that it was your repotting that caused it. Others may have different experiences they can share.