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		Orchid Board - Most Complete Orchid Forum on the web ! > ORCHID DISCUSSIONS > Pests & Diseases
Spreading black spots oncidium leaves

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07-18-2013, 07:54 PM

WhiteRabbit WhiteRabbit is offline

Senior Member

Join Date: May 2008

Zone: 9a

Location: Nor Cal

Posts: 26,634

Onc can be prone to spotting, tho yours does seem very heavy. What are temps and humidity like? Any air circulation? I mostly only see heavy spotting on mine that are forced to winter outside in very cool damp weather...

Are pbulbs slightly wrinkled, or quite shriveled? Try using a skewer in the media to help determine when to water. You might also want to check the roots.

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black, cut, leaf, leaves, spots, oncidium, spreading

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