google "ring spot viruses". Looks like it to me. Water borne viruses. Makes round necrotic spots just like this. Quit misting your plants so it doesn't spread. Mites make random damaged areas . These are uniform like ring spot virus damage.
Mistking
Looking for a misting system? Look no further. Automated misting systems from MistKing are used by multitude of plant enthusiasts and are perfect for Orchids. Systems feature run dry pumps, ZipDrip valve, adjustable black nozzles, per second control! Automatically mist one growing shelf or a greenhouse full of Orchids.
Thanks James. You are awesome, as always, and have spared my orchid collection from some insanity. I've been misting the top of the medium so I can get away with watering less frequently. I think I will just mix some moss in from now on. Crap.
Mistking
Looking for a misting system? Look no further. Automated misting systems from MistKing are used by multitude of plant enthusiasts and are perfect for Orchids. Systems feature run dry pumps, ZipDrip valve, adjustable black nozzles, per second control! Automatically mist one growing shelf or a greenhouse full of Orchids.
I just did some inspection, I have two plants with this disease and am going to have to toss both. So, farewell Paph Kiwi Charm and Masdevallia Veitchiana. I'm so bummed. I thought I was being careful and keeping the water off of the leaves. It's clear that I wasn't. Lesson learned.
Now don't be too hasty. This virus is localized and can be controlled to some extent by cutting off the leaf at the base with a sterile instrument (single use razor blade). Keep it away from your other plants for now and see if it develops any further. I say this because I battle virus all the time with rescued plants. Here is Blc Magic of Mishima "Volcano Queen" that I rescued as a specimen plant. It had areas of fungus and virus and did heroic battle with them. I have won to some extent. At times I get beautiful blooms out of the divisions and sometimes it reappears. Here is a current bloom off the worst of the lot. As long as I don't get any leaves wet on any of my orchids I have been able to bring most of them back to bloom beautifully. But if you don't have time or the patience to battle, them toss them. I just always hate tossing something alive. If you have a tree out in the yard you can mount it there and just cover it with straw and burlap for the winter and that will keep it alive through the winter.
Last edited by james mickelso; 08-16-2014 at 03:28 PM..