Too much sun or is it a virus, Physan 20
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  #1  
Old 08-16-2021, 09:41 AM
Jim S Jim S is offline
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Too much sun or is it a virus, Physan 20
Default Too much sun or is it a virus, Physan 20

Attached are pics of a cymbidium, I believe the brown circles on the leaf tips are from sun exposure - could they indicate a virus? The remainder of the leaves look good.
Plant is growing nicely.

Also attached is a pic of a miltassia with brown leaf damage at the base. The remainder of the leaves look good, the orchid seems to be growing a little slow.
Did a bug/bugs do this? I'll see a fruit fly once in a while around the orchids.

I recently got back into orchids after 25 years... I'm very watchful (yes, you can say paranoid) for overwatering, bugs and viruses, my orchids are growing very well. Before potting I flush the medium with Physan 20. It's been about a year since I've used Physan 20, does anyone just flush out their potted orchids with this or a similar product periodically as a matter of procedure?

Thanks for your help, it's appreciated.
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Too much sun or is it a virus, Physan 20-img_1121-jpg   Too much sun or is it a virus, Physan 20-img_1122-jpg   Too much sun or is it a virus, Physan 20-img_1123-jpg  
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  #2  
Old 08-16-2021, 12:51 PM
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Cymbidiums have spots like that most of the time. It's not sun overdose. I would not be concerned unless the spots spread a lot more widely. I would not spray with anything.
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Old 08-16-2021, 02:07 PM
Jim S Jim S is offline
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Thx. Any thoughts on the Miltassia?
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  #4  
Old 08-16-2021, 02:38 PM
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I totally agree on the Cyms. That sort of spotting happens frequently. Can be from water droplets focusing the sun to toast the area uderneath, or some local bacterial or fungal issue, but nothing that needs treating. The Miltassia almost looks like something took a bite.. the damaged area looks like it has dried up. If it spreads you could clip off the leaf. But probably also no big deal.

Out of curiosity, where do you live? Cyms indoors? Unless you're getting hard frost (in August?) they are usually better off outdoors. If they don't get adequate light (a lot of it), and day-nigh temperature variation (especially in the fall), they tend to bloom poorly or not at all.
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Old 08-16-2021, 03:05 PM
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I live in Minnesota, self employed, with an office that has two areas for perfect mid-level and high-level light. The greatest challenge is temperature. The cym is doing well, not quite at flowering size yet. Brassavola and Phal grow like weeds, psychopsis is growing well.
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Old 08-16-2021, 03:44 PM
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If you can put the Cym outside until it starts to seriously cool off, you may be surprised, depending on which one, I think it could be big enough to bloom. If it still doesn't, there are Cyms that don't need to cool down at all, well worth pursuing (Note the ones that are doing just fine in Florida, the "Hot Cyms")
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Old 08-16-2021, 04:07 PM
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Jim welcome back, I am just getting back into orchids once again also.
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