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This is a discussion on Encyclia mariae Weird spots on leaves within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I acquired this Encyclia mariae last year and quickly mounted it with a little sphag, ...
I acquired this Encyclia mariae last year and quickly mounted it with a little sphag, as all the culture info I read said it only survives if mounted. Everything was going fine, (I got 3 new growths) until this spring when I noticed these 'dried' looking spots on the leaves of the biggest new growth. After some poking around I noticed that the new roots that had grown into the moss were dead at the points that touched the moss. After I removed the moss, I didn't notice any bugs or rot. So I am dumbfounded about what might be causing this or if I should even be worried. Any info or tips about what this could be from or culture info on this plant would be appreciated.
I think Bruce is right.
It looks like possible sunburn to me. Has it started getting more light lately?
I don't think it is slugs simply because it is suspended from a nail on my porch, not touching anything like a post or a bench. No extra sun actually less as the tree that provides shade has leafed out since March.
In case it is slugs what can I do to prevent them from returning? Is there some special technique, I've never combatted them.
If slugs/snails are out of the question, it could very well be a little leaf spotting fungus that has run its course, and the affected areas have just dried up. Encyclias need lots of light and lots of air movement. They grow in very very exposed areas with minimal shade, and virtually no protection from wind. Whenever I see them growing in the wild here, I am always amazed that they can survive in such intense sun/heat and wind with no rain for weeks at a time. And yet they thrive in these conditions. All of that said, I would think by the tender green color of your plant that it needs a lot more light in order to harden off the mature growths. And as far as the root tips dying as they touch the sphag, you may have fertilizer buildup that is burning the root tips. How do you water, and what is your watering/fertilizing schedule? Happy Growing!
I spray all my bare root mounted orchids daily with a 1/10 fertilizer strength solution and all mounted with sphagnum moss every other day. If it was salt buildup that won't be a problem anymore since I took all the moss off the mount. I also thought it needed more light but all the leaves turned yellowish where it used to be so I moved it back some and all the leaves but one returned to their green color. I would say it gets great light because I get a decent shadow on the plant when I hold my hand in front of it.
I have noticed that the new growths look a little stunted as if the plant was stressed when they were maturing one is so small and looks to be mature since it has a new growth off of it.