Oncidium with brown spots on leaves
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Oncidium with brown spots on leaves
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  #1  
Old 02-02-2010, 07:51 PM
bmjayne bmjayne is offline
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Join Date: Feb 2010
Posts: 5
Oncidium with brown spots on leaves
Exclamation Oncidium with brown spots on leaves

Hello,

I have an oncidium that has quite suddenly developed two oval brown spots on a leaf. Around the spots appears to be a watery, dark green, translucent area as if the cells in that area are affected.

This plant has had a history of leaf spots, so I have been carefully watching the new, clean growth for months. These spots were not there two days ago, when I applied a preventative spray of Physan 20.

I have sprayed again with Physan 20 today, but the watery-looking area around the two spots has slightly expanded since then.

Any ideas? It seems as though the Physan is inadequate - maybe I need to get a systemic?



Thanks!
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  #2  
Old 02-03-2010, 09:39 AM
mojomick mojomick is offline
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Join Date: Jun 2007
Zone: 7a
Location: Tri Cities, Washington
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Oncidium with brown spots on leaves Female
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Oncidium are well known for having spots on leaves. It could be water splash.
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  #3  
Old 02-03-2010, 11:05 AM
ohanahana ohanahana is offline
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Location: Louisiana
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Oncidium with brown spots on leaves Female
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where in the greenhouse should oncidiums be placed?? i can't seem to avoid watering only what's to be watered!!
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  #4  
Old 02-03-2010, 02:51 PM
bmjayne bmjayne is offline
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Oncidium with brown spots on leaves
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Update:

As of last night the watery splotch around the two spots had spread a little. However, much to my surprise, this watery margin completely cleared up overnight! I am crediting the Physan for this. I am now left with two oval brown spots that don't seem to be harming anything at the moment.

So, it seems my problem is solved, for now.
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disease, fungicide, oncidium, rot, spots


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