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Old 05-21-2013, 09:15 PM
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black spots on catt leaves

Could someone please tell me what these black spotty markings on my catt leaf are? Actually, 3 leaves are affected and look basically the same. When I looking through my orchids today in order to decide which are ready for a repot, I found the problem then. I haven't noticed it in the past, but I could have overlooked it, of course.

I would appreciate your help...
Vicki
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Last edited by brit6v; 05-22-2013 at 02:22 PM. Reason: misworded sentence
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Old 05-22-2013, 09:44 AM
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anyone,please??

I can't find any information on this.
Vicki
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Old 05-22-2013, 09:52 AM
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It looks like a fungus to me. Spray with a fungacide and it should stop it spreading. The leaf however will always bear the scars.
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Old 05-22-2013, 10:11 AM
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Probably fungus, as plucker says.

For an online guide to common diseases, see: Orchid Diseases
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Old 05-22-2013, 02:13 PM
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plucker

Thank you, Plucker
I'll treat it this afternoon or no later than tomorr. morn.. Two more questions, please: When the fungus is gone, how will I know that it's totally gone, by the fact that no more leaves become infected or what? How long would you confine this plant from the others in my greenhouse? I have it on the inside of the house near an east facing window.
Thanks again,
Vicki

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It looks like a fungus to me. Spray with a fungacide and it should stop it spreading. The leaf however will always bear the scars.

Last edited by brit6v; 05-22-2013 at 02:15 PM. Reason: incorrect spelling
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Old 05-22-2013, 02:17 PM
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Catt Mandu

Thank you for the advice and the link.....
Vicki




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Probably fungus, as plucker says.

For an online guide to common diseases, see: Orchid Diseases
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Old 05-23-2013, 02:56 AM
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I have had a few plants in my collection over the years with either that fungus or one very similar. The black marks will always stay there until it drops the leaf. If it is left untreated, others will get it. Unlikely to ever kill a catt even if untreated but it looks bad.

On the bright side, it is very slow growing and probably more like a mould.
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Old 05-23-2013, 10:24 AM
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looks a little like sooty mold..any problem with rugnose whiteflies up there
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Old 05-23-2013, 04:46 PM
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plucker

Thank you again, plucker. I appreciate your help.
Vicki

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Originally Posted by plucker View Post
I have had a few plants in my collection over the years with either that fungus or one very similar. The black marks will always stay there until it drops the leaf. If it is left untreated, others will get it. Unlikely to ever kill a catt even if untreated but it looks bad.

On the bright side, it is very slow growing and probably more like a mould.
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Old 05-23-2013, 04:50 PM
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Catt Mandu

Thanks for your reply, help and the link, Catt. I want to check your link out soon but time dictates, of course.
Vicki


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Probably fungus, as plucker says.

For an online guide to common diseases, see: Orchid Diseases

Last edited by brit6v; 05-23-2013 at 04:57 PM. Reason: whoops! I see now that I have already replied...sorry, but thanks Catt
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Old 05-23-2013, 04:54 PM
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2woodensticks

No problem (thankfully) with whiteflies. I've never heard of "rugnose" whiteflies.....I'm guessing both are the same ??

Thanks for your reply and help,
Vicki


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looks a little like sooty mold..any problem with rugnose whiteflies up there
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Old 05-24-2013, 03:59 PM
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You might take a marker and outline the spot, and then you can tell if it grows bigger or
not.
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Old 05-24-2013, 11:28 PM
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11Orchid126

Thanks, good idea...
Vicki




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You might take a marker and outline the spot, and then you can tell if it grows bigger or
not.
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