Brown rot on grammatophyllum?
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Old 02-23-2019, 04:05 PM
Kilmiquix Kilmiquix is offline

Join Date: Feb 2019
Zone: 10b
Location: Coral Springs, FL
Posts: 78
Brown rot on grammatophyllum?
Default Brown rot on grammatophyllum?

Hello, again, all!

If I have multiple questions regarding pest/disease on different orchids, should I post them all in one thread or split them up?

In the meantime, is this brown rot on a gramma leaf? There are a few other leaves with spots on them, but I'm primarily talking about the first one.

If so, treatment advice? Should I cut off the leaf/s?

In the first pic, the spot is kinda watery and translucent. In the second one, the spots are darker, a little sunken, and dry.
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Brown rot on grammatophyllum?-gram1-jpg   Brown rot on grammatophyllum?-gram2-jpg  
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Old 02-23-2019, 05:26 PM
estación seca's Avatar
estación seca estación seca is offline
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Join Date: Jun 2015
Zone: 9b
Location: Phoenix AZ - Lower Sonoran Desert
Posts: 9,702
Brown rot on grammatophyllum? Male

In warm, high-humidity areas like yours, most outdoor orchids have lots of spots like these. I don't have your conditions so I'm not sure which are worrisome and which aren't. The St Augustine Orchid Society has a Web page devoted to pests and diseases; you might find that helpful.
It's a dry heat.
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brown, leaves, primarily, rot, spots

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