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Old 08-28-2009, 03:53 PM   #11 (permalink)
sandy0225
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Default Re: black disease on leaves

it looks like some kind of an environmental stress reaction to me. The newer leaves don't look like that, right (hard to see in the picture). Cut off the leave that bother you and see if it doesn't just grow out of it. Definitely not a cause for destruction of the plant.
Also do you have spider mites?
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