Spotting on Underside of Phaius Leaves?
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  #1  
Old 06-30-2020, 05:51 PM
Pynn Pynn is offline
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Spotting on Underside of Phaius Leaves?
Default Spotting on Underside of Phaius Leaves?

I would have thought this was bruises from overhead watering or something, but the spotting only appears on the underside of the leaves. Has anyone seen this before?

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  #2  
Old 06-30-2020, 07:56 PM
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Spotting on Underside of Phaius Leaves? Female
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Try wiping the leaves with a wet tissue - if you get red streaks, spidermites. It might be spidermites anyway... they hide on the underside of leaves, and LOVE to attack soft-leaved plants. You can spray the undersides of the leaves (tops too) with soapy water and/or rubbing alcohol for a start, but if it is spidermites, stronger measures (a miticide) are needed.
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Old 06-30-2020, 08:26 PM
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Quote:
Originally Posted by Roberta View Post
Try wiping the leaves with a wet tissue - if you get red streaks, spidermites. It might be spidermites anyway... they hide on the underside of leaves, and LOVE to attack soft-leaved plants. You can spray the undersides of the leaves (tops too) with soapy water and/or rubbing alcohol for a start, but if it is spidermites, stronger measures (a miticide) are needed.
No red streaks - there doesn't seem to be anything to wipe away. The spotting is part of the leaf, a lot like the spotting that shows up on Oncidium leaf-tips if you know what I mean?
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Old 06-30-2020, 08:50 PM
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Spotting on Underside of Phaius Leaves? Female
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So maybe fungal (a spray-down with Physan might be useful) Where do you grow the plants? (Inside, greenhouse, outside?) If the last, where do you live? Someone who lives in similar conditions can then jump in.
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Old 06-30-2020, 10:28 PM
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The camera hasn't focused properly onto the spotted regions - slightly blurred.

Are the spots black-coloured? Or some other colour?

And do you have some gentle air-movement in the growing area?
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Old 07-01-2020, 01:44 AM
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Spotting on Underside of Phaius Leaves? Male
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Are you sure this isn't normal? I don't know this plant. The rest of the leaves look healthy.
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Old 07-01-2020, 12:00 PM
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Spotting on Underside of Phaius Leaves?
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Could it possibly be a nutrient issue? My other plants tend to let me know when they need more of a certain nutrient by the coloring of their leaves.

I checked my pair of Phaius and did not see this.
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