How do I treat orchids for any disease of the leaves?

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I have a phal and it has developed a soft, wet-looking spot on one of the leaves.
  4 answers
  • Douglas Hunt Douglas Hunt on Sep 09, 2013
    It sounds like that may be some type of bacterial rot, which needs to be dealt with as quickly as possible. Take a look at the photos in the following link and see they match the conditions on your phalaenopsis and follow the treatment given: http://www.staugorchidsociety.org/culturepests-diseases.htm

  • GrandmaCarol Speight GrandmaCarol Speight on Sep 09, 2013
    You may want to cruise through this link to find a site that may have the answer you are looking for. Good luck. http://orchids.meetup.com/

  • Patrick Masoperh Patrick Masoperh on Sep 09, 2013
    It is certainly a highly infectious bacterial rot. Isolate it immediately from any other orchids and carefully detach the infected leaf, being careful not to 'juice/drip' the rot on to healthy leaves. DO NOT COMPOST INFECTED LEAF but dispose off into an incinerator or garbage bin. Cutting down on watering, especially in the afternoon or dusk, is one sure way of checking the infection. Do make sure you disinfect all tools (including your fingers) which come into contact with the infection. Be warned - those water-soaked leaves stink to highest heaven!!!.

  • Jacinth Barnett Jacinth Barnett on Sep 09, 2013
    Thanks for your advice, guys, I had started by cutting off the infected leaf and spraying all the orchids with "Top Cop" which is a fungicide. Please let me know what you think.

    • Douglas Hunt Douglas Hunt on Sep 10, 2013
      @Jacinth Barnett It sounds like that fungicide might have copper in it, so I think you've done exactly the right thing. Good luck with your orchids.